Finding the Fourth Proportional to 94,409.47, 142,131.00 and 86,142.61

Step by Step Solution

1. Step 1: Write the proportion equation
   94,409.47 : 142,131.00 = 86,142.61 : x
2. Step 2: Convert to fraction form
   94,409.47/142,131.00 = 86,142.61/x
3. Step 3: Cross multiply
   94,409.47x = 142,131.00 × 86,142.61
4. Step 4: Simplify right side
   94,409.47x = 12,243,535,003.12
5. Step 5: Solve for x
   x = 12,243,535,003.12/94,409.47
6. Step 6: Final answer
   x = 129,685.46