Finding the Fourth Proportional to 142,388.28, 196,560.27 and 91,474.92

Step by Step Solution

1. Step 1: Write the proportion equation
   142,388.28 : 196,560.27 = 91,474.92 : x
2. Step 2: Convert to fraction form
   142,388.28/196,560.27 = 91,474.92/x
3. Step 3: Cross multiply
   142,388.28x = 196,560.27 × 91,474.92
4. Step 4: Simplify right side
   142,388.28x = 17,980,334,973.43
5. Step 5: Solve for x
   x = 17,980,334,973.43/142,388.28
6. Step 6: Final answer
   x = 126,276.79