Finding the Fourth Proportional to 111,767.24, 154,112.80 and 81,499.16

Step by Step Solution

1. Step 1: Write the proportion equation
   111,767.24 : 154,112.80 = 81,499.16 : x
2. Step 2: Convert to fraction form
   111,767.24/154,112.80 = 81,499.16/x
3. Step 3: Cross multiply
   111,767.24x = 154,112.80 × 81,499.16
4. Step 4: Simplify right side
   111,767.24x = 12,560,063,745.25
5. Step 5: Solve for x
   x = 12,560,063,745.25/111,767.24
6. Step 6: Final answer
   x = 112,376.97