Finding the Fourth Proportional to 111,807.72, 154,307.79 and 64,076.40

Step by Step Solution

1. Step 1: Write the proportion equation
   111,807.72 : 154,307.79 = 64,076.40 : x
2. Step 2: Convert to fraction form
   111,807.72/154,307.79 = 64,076.40/x
3. Step 3: Cross multiply
   111,807.72x = 154,307.79 × 64,076.40
4. Step 4: Simplify right side
   111,807.72x = 9,887,487,675.16
5. Step 5: Solve for x
   x = 9,887,487,675.16/111,807.72
6. Step 6: Final answer
   x = 88,432.96