Finding the Fourth Proportional to 142,090, 196,061.88 and 81,648.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,090 : 196,061.88 = 81,648.96 : x
2. Step 2: Convert to fraction form
   142,090/196,061.88 = 81,648.96/x
3. Step 3: Cross multiply
   142,090x = 196,061.88 × 81,648.96
4. Step 4: Simplify right side
   142,090x = 16,008,248,597.64
5. Step 5: Solve for x
   x = 16,008,248,597.64/142,090
6. Step 6: Final answer
   x = 112,662.74