Finding the Fourth Proportional to 1,069,131.17, 1,475,400.98 and 639,411.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069,131.17 : 1,475,400.98 = 639,411.29 : x
2. Step 2: Convert to fraction form
   1,069,131.17/1,475,400.98 = 639,411.29/x
3. Step 3: Cross multiply
   1,069,131.17x = 1,475,400.98 × 639,411.29
4. Step 4: Simplify right side
   1,069,131.17x = 943,388,033,315.00
5. Step 5: Solve for x
   x = 943,388,033,315.00/1,069,131.17
6. Step 6: Final answer
   x = 882,387.55