Finding the Fourth Proportional to 142,152.68, 196,182.24 and 81,742.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,152.68 : 196,182.24 = 81,742.96 : x
2. Step 2: Convert to fraction form
   142,152.68/196,182.24 = 81,742.96/x
3. Step 3: Cross multiply
   142,152.68x = 196,182.24 × 81,742.96
4. Step 4: Simplify right side
   142,152.68x = 16,036,516,997.03
5. Step 5: Solve for x
   x = 16,036,516,997.03/142,152.68
6. Step 6: Final answer
   x = 112,811.92