Finding the Fourth Proportional to 142,124.82, 196,132.50 and 78,462.72

Step by Step Solution

1. Step 1: Write the proportion equation
   142,124.82 : 196,132.50 = 78,462.72 : x
2. Step 2: Convert to fraction form
   142,124.82/196,132.50 = 78,462.72/x
3. Step 3: Cross multiply
   142,124.82x = 196,132.50 × 78,462.72
4. Step 4: Simplify right side
   142,124.82x = 15,389,089,430.40
5. Step 5: Solve for x
   x = 15,389,089,430.40/142,124.82
6. Step 6: Final answer
   x = 108,278.69