Finding the Fourth Proportional to 111,264, 166,285.15 and 81,341.23

Step by Step Solution

1. Step 1: Write the proportion equation
   111,264 : 166,285.15 = 81,341.23 : x
2. Step 2: Convert to fraction form
   111,264/166,285.15 = 81,341.23/x
3. Step 3: Cross multiply
   111,264x = 166,285.15 × 81,341.23
4. Step 4: Simplify right side
   111,264x = 13,525,838,225.03
5. Step 5: Solve for x
   x = 13,525,838,225.03/111,264
6. Step 6: Final answer
   x = 121,565.27