Finding the Fourth Proportional to 111,838.10, 154,285.71 and 66,490.35

Step by Step Solution

1. Step 1: Write the proportion equation
   111,838.10 : 154,285.71 = 66,490.35 : x
2. Step 2: Convert to fraction form
   111,838.10/154,285.71 = 66,490.35/x
3. Step 3: Cross multiply
   111,838.10x = 154,285.71 × 66,490.35
4. Step 4: Simplify right side
   111,838.10x = 10,258,510,857.90
5. Step 5: Solve for x
   x = 10,258,510,857.90/111,838.10
6. Step 6: Final answer
   x = 91,726.44