Finding the Fourth Proportional to 142,123.98, 196,145.54 and 81,697.18

Step by Step Solution

1. Step 1: Write the proportion equation
   142,123.98 : 196,145.54 = 81,697.18 : x
2. Step 2: Convert to fraction form
   142,123.98/196,145.54 = 81,697.18/x
3. Step 3: Cross multiply
   142,123.98x = 196,145.54 × 81,697.18
4. Step 4: Simplify right side
   142,123.98x = 16,024,537,487.58
5. Step 5: Solve for x
   x = 16,024,537,487.58/142,123.98
6. Step 6: Final answer
   x = 112,750.41