Finding the Fourth Proportional to 199,143.47, 274,816.46 and 108,499.15

Step by Step Solution

1. Step 1: Write the proportion equation
   199,143.47 : 274,816.46 = 108,499.15 : x
2. Step 2: Convert to fraction form
   199,143.47/274,816.46 = 108,499.15/x
3. Step 3: Cross multiply
   199,143.47x = 274,816.46 × 108,499.15
4. Step 4: Simplify right side
   199,143.47x = 29,817,352,930.78
5. Step 5: Solve for x
   x = 29,817,352,930.78/199,143.47
6. Step 6: Final answer
   x = 149,728.00