Finding the Fourth Proportional to 142,387.20, 196,410.24 and 88,680.96

Step by Step Solution

1. Step 1: Write the proportion equation
   142,387.20 : 196,410.24 = 88,680.96 : x
2. Step 2: Convert to fraction form
   142,387.20/196,410.24 = 88,680.96/x
3. Step 3: Cross multiply
   142,387.20x = 196,410.24 × 88,680.96
4. Step 4: Simplify right side
   142,387.20x = 17,417,848,637.03
5. Step 5: Solve for x
   x = 17,417,848,637.03/142,387.20
6. Step 6: Final answer
   x = 122,327.35