Finding the Fourth Proportional to 250,080.72, 345,130.56 and 142,653.12

Step by Step Solution

1. Step 1: Write the proportion equation
   250,080.72 : 345,130.56 = 142,653.12 : x
2. Step 2: Convert to fraction form
   250,080.72/345,130.56 = 142,653.12/x
3. Step 3: Cross multiply
   250,080.72x = 345,130.56 × 142,653.12
4. Step 4: Simplify right side
   250,080.72x = 49,233,951,191.35
5. Step 5: Solve for x
   x = 49,233,951,191.35/250,080.72
6. Step 6: Final answer
   x = 196,872.24