Finding the Fourth Proportional to 398,019.72, 548,332.72 and 276,953.08

Step by Step Solution

1. Step 1: Write the proportion equation
   398,019.72 : 548,332.72 = 276,953.08 : x
2. Step 2: Convert to fraction form
   398,019.72/548,332.72 = 276,953.08/x
3. Step 3: Cross multiply
   398,019.72x = 548,332.72 × 276,953.08
4. Step 4: Simplify right side
   398,019.72x = 151,862,435,668.78
5. Step 5: Solve for x
   x = 151,862,435,668.78/398,019.72
6. Step 6: Final answer
   x = 381,545.00