Finding the Fourth Proportional to 89,106.68, 123,129.42 and 84,787.96

Step by Step Solution

1. Step 1: Write the proportion equation
   89,106.68 : 123,129.42 = 84,787.96 : x
2. Step 2: Convert to fraction form
   89,106.68/123,129.42 = 84,787.96/x
3. Step 3: Cross multiply
   89,106.68x = 123,129.42 × 84,787.96
4. Step 4: Simplify right side
   89,106.68x = 10,439,892,337.78
5. Step 5: Solve for x
   x = 10,439,892,337.78/89,106.68
6. Step 6: Final answer
   x = 117,161.72