Finding the Fourth Proportional to 102,682.59, 153,673.43 and 86,061.39

Step by Step Solution

1. Step 1: Write the proportion equation
   102,682.59 : 153,673.43 = 86,061.39 : x
2. Step 2: Convert to fraction form
   102,682.59/153,673.43 = 86,061.39/x
3. Step 3: Cross multiply
   102,682.59x = 153,673.43 × 86,061.39
4. Step 4: Simplify right side
   102,682.59x = 13,225,348,561.56
5. Step 5: Solve for x
   x = 13,225,348,561.56/102,682.59
6. Step 6: Final answer
   x = 128,798.35