Finding the Fourth Proportional to 870,990.24, 1,306,484.86 and 272,002.72

Step by Step Solution

1. Step 1: Write the proportion equation
   870,990.24 : 1,306,484.86 = 272,002.72 : x
2. Step 2: Convert to fraction form
   870,990.24/1,306,484.86 = 272,002.72/x
3. Step 3: Cross multiply
   870,990.24x = 1,306,484.86 × 272,002.72
4. Step 4: Simplify right side
   870,990.24x = 355,367,435,558.82
5. Step 5: Solve for x
   x = 355,367,435,558.82/870,990.24
6. Step 6: Final answer
   x = 408,003.92