Finding the Fourth Proportional to 423,482.73, 635,089.38 and 139,107.31

Step by Step Solution

1. Step 1: Write the proportion equation
   423,482.73 : 635,089.38 = 139,107.31 : x
2. Step 2: Convert to fraction form
   423,482.73/635,089.38 = 139,107.31/x
3. Step 3: Cross multiply
   423,482.73x = 635,089.38 × 139,107.31
4. Step 4: Simplify right side
   423,482.73x = 88,345,572,105.78
5. Step 5: Solve for x
   x = 88,345,572,105.78/423,482.73
6. Step 6: Final answer
   x = 208,616.70