Finding the Fourth Proportional to 1,139,414.88, 1,572,351.30 and 623,151.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,414.88 : 1,572,351.30 = 623,151.12 : x
2. Step 2: Convert to fraction form
   1,139,414.88/1,572,351.30 = 623,151.12/x
3. Step 3: Cross multiply
   1,139,414.88x = 1,572,351.30 × 623,151.12
4. Step 4: Simplify right side
   1,139,414.88x = 979,812,473,628.46
5. Step 5: Solve for x
   x = 979,812,473,628.46/1,139,414.88
6. Step 6: Final answer
   x = 859,925.99