Finding the Fourth Proportional to 2,565,866,334.72, 3,540,895,397.28 and 1,392,444,606.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,565,866,334.72 : 3,540,895,397.28 = 1,392,444,606.72 : x
2. Step 2: Convert to fraction form
   2,565,866,334.72/3,540,895,397.28 = 1,392,444,606.72/x
3. Step 3: Cross multiply
   2,565,866,334.72x = 3,540,895,397.28 × 1,392,444,606.72
4. Step 4: Simplify right side
   2,565,866,334.72x = 4,930,500,698,902,208,512
5. Step 5: Solve for x
   x = 4,930,500,698,902,208,512/2,565,866,334.72
6. Step 6: Final answer
   x = 1,921,573,478.78