Finding the Fourth Proportional to 108,559.72, 149,904.18 and 81,655.36

Step by Step Solution

1. Step 1: Write the proportion equation
   108,559.72 : 149,904.18 = 81,655.36 : x
2. Step 2: Convert to fraction form
   108,559.72/149,904.18 = 81,655.36/x
3. Step 3: Cross multiply
   108,559.72x = 149,904.18 × 81,655.36
4. Step 4: Simplify right side
   108,559.72x = 12,240,479,783.40
5. Step 5: Solve for x
   x = 12,240,479,783.40/108,559.72
6. Step 6: Final answer
   x = 112,753.42