Finding the Fourth Proportional to 142,444.72, 196,572.72 and 78,780.16

Step by Step Solution

1. Step 1: Write the proportion equation
   142,444.72 : 196,572.72 = 78,780.16 : x
2. Step 2: Convert to fraction form
   142,444.72/196,572.72 = 78,780.16/x
3. Step 3: Cross multiply
   142,444.72x = 196,572.72 × 78,780.16
4. Step 4: Simplify right side
   142,444.72x = 15,486,030,333.24
5. Step 5: Solve for x
   x = 15,486,030,333.24/142,444.72
6. Step 6: Final answer
   x = 108,716.07