Finding the Fourth Proportional to 131,411.76, 181,284.81 and 86,069.79

Step by Step Solution

1. Step 1: Write the proportion equation
   131,411.76 : 181,284.81 = 86,069.79 : x
2. Step 2: Convert to fraction form
   131,411.76/181,284.81 = 86,069.79/x
3. Step 3: Cross multiply
   131,411.76x = 181,284.81 × 86,069.79
4. Step 4: Simplify right side
   131,411.76x = 15,603,145,526.89
5. Step 5: Solve for x
   x = 15,603,145,526.89/131,411.76
6. Step 6: Final answer
   x = 118,734.77