Finding the Fourth Proportional to 661,816.72, 913,298.52 and 360,010.72

Step by Step Solution

1. Step 1: Write the proportion equation
   661,816.72 : 913,298.52 = 360,010.72 : x
2. Step 2: Convert to fraction form
   661,816.72/913,298.52 = 360,010.72/x
3. Step 3: Cross multiply
   661,816.72x = 913,298.52 × 360,010.72
4. Step 4: Simplify right side
   661,816.72x = 328,797,257,760.13
5. Step 5: Solve for x
   x = 328,797,257,760.13/661,816.72
6. Step 6: Final answer
   x = 496,810.14