Finding the Fourth Proportional to 1,440,540.72, 2,160,583.92 and 906,426.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,440,540.72 : 2,160,583.92 = 906,426.72 : x
2. Step 2: Convert to fraction form
   1,440,540.72/2,160,583.92 = 906,426.72/x
3. Step 3: Cross multiply
   1,440,540.72x = 2,160,583.92 × 906,426.72
4. Step 4: Simplify right side
   1,440,540.72x = 1,958,410,995,890.34
5. Step 5: Solve for x
   x = 1,958,410,995,890.34/1,440,540.72
6. Step 6: Final answer
   x = 1,359,497.14