Finding the Fourth Proportional to 1,139,488.02, 1,572,429.51 and 623,139.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,488.02 : 1,572,429.51 = 623,139.22 : x
2. Step 2: Convert to fraction form
   1,139,488.02/1,572,429.51 = 623,139.22/x
3. Step 3: Cross multiply
   1,139,488.02x = 1,572,429.51 × 623,139.22
4. Step 4: Simplify right side
   1,139,488.02x = 979,842,498,366.38
5. Step 5: Solve for x
   x = 979,842,498,366.38/1,139,488.02
6. Step 6: Final answer
   x = 859,897.15