Finding the Fourth Proportional to 111,915.62, 154,456.89 and 64,168.82

Step by Step Solution

1. Step 1: Write the proportion equation
   111,915.62 : 154,456.89 = 64,168.82 : x
2. Step 2: Convert to fraction form
   111,915.62/154,456.89 = 64,168.82/x
3. Step 3: Cross multiply
   111,915.62x = 154,456.89 × 64,168.82
4. Step 4: Simplify right side
   111,915.62x = 9,911,316,372.17
5. Step 5: Solve for x
   x = 9,911,316,372.17/111,915.62
6. Step 6: Final answer
   x = 88,560.62