Finding the Fourth Proportional to 142,049.72, 196,062.17 and 81,655.40

Step by Step Solution

1. Step 1: Write the proportion equation
   142,049.72 : 196,062.17 = 81,655.40 : x
2. Step 2: Convert to fraction form
   142,049.72/196,062.17 = 81,655.40/x
3. Step 3: Cross multiply
   142,049.72x = 196,062.17 × 81,655.40
4. Step 4: Simplify right side
   142,049.72x = 16,009,534,507.94
5. Step 5: Solve for x
   x = 16,009,534,507.94/142,049.72
6. Step 6: Final answer
   x = 112,703.74