Finding the Fourth Proportional to 111,936.66, 154,505.16 and 89,432.34

Step by Step Solution

1. Step 1: Write the proportion equation
   111,936.66 : 154,505.16 = 89,432.34 : x
2. Step 2: Convert to fraction form
   111,936.66/154,505.16 = 89,432.34/x
3. Step 3: Cross multiply
   111,936.66x = 154,505.16 × 89,432.34
4. Step 4: Simplify right side
   111,936.66x = 13,817,758,000.87
5. Step 5: Solve for x
   x = 13,817,758,000.87/111,936.66
6. Step 6: Final answer
   x = 123,442.65