Finding the Fourth Proportional to 89,989.70, 135,123.27 and 76,131.81

Step by Step Solution

1. Step 1: Write the proportion equation
   89,989.70 : 135,123.27 = 76,131.81 : x
2. Step 2: Convert to fraction form
   89,989.70/135,123.27 = 76,131.81/x
3. Step 3: Cross multiply
   89,989.70x = 135,123.27 × 76,131.81
4. Step 4: Simplify right side
   89,989.70x = 10,287,178,737.56
5. Step 5: Solve for x
   x = 10,287,178,737.56/89,989.70
6. Step 6: Final answer
   x = 114,315.08