Finding the Fourth Proportional to 89,362.56, 133,375.20 and 87,886.38

Step by Step Solution

1. Step 1: Write the proportion equation
   89,362.56 : 133,375.20 = 87,886.38 : x
2. Step 2: Convert to fraction form
   89,362.56/133,375.20 = 87,886.38/x
3. Step 3: Cross multiply
   89,362.56x = 133,375.20 × 87,886.38
4. Step 4: Simplify right side
   89,362.56x = 11,721,863,509.78
5. Step 5: Solve for x
   x = 11,721,863,509.78/89,362.56
6. Step 6: Final answer
   x = 131,171.98