Finding the Fourth Proportional to 131,700.39, 181,697.61 and 86,403.57

Step by Step Solution

1. Step 1: Write the proportion equation
   131,700.39 : 181,697.61 = 86,403.57 : x
2. Step 2: Convert to fraction form
   131,700.39/181,697.61 = 86,403.57/x
3. Step 3: Cross multiply
   131,700.39x = 181,697.61 × 86,403.57
4. Step 4: Simplify right side
   131,700.39x = 15,699,322,164.47
5. Step 5: Solve for x
   x = 15,699,322,164.47/131,700.39
6. Step 6: Final answer
   x = 119,204.83