Finding the Fourth Proportional to 131,288.76, 196,931.70 and 89,064.27

Step by Step Solution

1. Step 1: Write the proportion equation
   131,288.76 : 196,931.70 = 89,064.27 : x
2. Step 2: Convert to fraction form
   131,288.76/196,931.70 = 89,064.27/x
3. Step 3: Cross multiply
   131,288.76x = 196,931.70 × 89,064.27
4. Step 4: Simplify right side
   131,288.76x = 17,539,578,100.36
5. Step 5: Solve for x
   x = 17,539,578,100.36/131,288.76
6. Step 6: Final answer
   x = 133,595.43