Finding the Fourth Proportional to 142,847.74, 197,132.09 and 78,322.86

Step by Step Solution

1. Step 1: Write the proportion equation
   142,847.74 : 197,132.09 = 78,322.86 : x
2. Step 2: Convert to fraction form
   142,847.74/197,132.09 = 78,322.86/x
3. Step 3: Cross multiply
   142,847.74x = 197,132.09 × 78,322.86
4. Step 4: Simplify right side
   142,847.74x = 15,439,949,522.89
5. Step 5: Solve for x
   x = 15,439,949,522.89/142,847.74
6. Step 6: Final answer
   x = 108,086.76