Finding the Fourth Proportional to 105,391,256, 145,439,933.28 and 57,156,760

Step by Step Solution

1. Step 1: Write the proportion equation
   105,391,256 : 145,439,933.28 = 57,156,760 : x
2. Step 2: Convert to fraction form
   105,391,256/145,439,933.28 = 57,156,760/x
3. Step 3: Cross multiply
   105,391,256x = 145,439,933.28 × 57,156,760
4. Step 4: Simplify right side
   105,391,256x = 8,312,875,360,900,973
5. Step 5: Solve for x
   x = 8,312,875,360,900,973/105,391,256
6. Step 6: Final answer
   x = 78,876,328.80