Finding the Fourth Proportional to 142,147.44, 196,164.72 and 78,490.08

Step by Step Solution

1. Step 1: Write the proportion equation
   142,147.44 : 196,164.72 = 78,490.08 : x
2. Step 2: Convert to fraction form
   142,147.44/196,164.72 = 78,490.08/x
3. Step 3: Cross multiply
   142,147.44x = 196,164.72 × 78,490.08
4. Step 4: Simplify right side
   142,147.44x = 15,396,984,565.98
5. Step 5: Solve for x
   x = 15,396,984,565.98/142,147.44
6. Step 6: Final answer
   x = 108,317.00