Finding the Fourth Proportional to 357,390.72, 535,967.15 and 144,103.55

Step by Step Solution

1. Step 1: Write the proportion equation
   357,390.72 : 535,967.15 = 144,103.55 : x
2. Step 2: Convert to fraction form
   357,390.72/535,967.15 = 144,103.55/x
3. Step 3: Cross multiply
   357,390.72x = 535,967.15 × 144,103.55
4. Step 4: Simplify right side
   357,390.72x = 77,234,766,003.32
5. Step 5: Solve for x
   x = 77,234,766,003.32/357,390.72
6. Step 6: Final answer
   x = 216,107.36