Finding the Fourth Proportional to 116,180.34, 173,931.99 and 86,326.89

Step by Step Solution

1. Step 1: Write the proportion equation
   116,180.34 : 173,931.99 = 86,326.89 : x
2. Step 2: Convert to fraction form
   116,180.34/173,931.99 = 86,326.89/x
3. Step 3: Cross multiply
   116,180.34x = 173,931.99 × 86,326.89
4. Step 4: Simplify right side
   116,180.34x = 15,015,007,768.21
5. Step 5: Solve for x
   x = 15,015,007,768.21/116,180.34
6. Step 6: Final answer
   x = 129,238.80