Finding the Fourth Proportional to 260,662.02, 391,023.81 and 83,106.78

Step by Step Solution

1. Step 1: Write the proportion equation
   260,662.02 : 391,023.81 = 83,106.78 : x
2. Step 2: Convert to fraction form
   260,662.02/391,023.81 = 83,106.78/x
3. Step 3: Cross multiply
   260,662.02x = 391,023.81 × 83,106.78
4. Step 4: Simplify right side
   260,662.02x = 32,496,729,752.43
5. Step 5: Solve for x
   x = 32,496,729,752.43/260,662.02
6. Step 6: Final answer
   x = 124,669.98