Finding the Fourth Proportional to 865,627.18, 1,298,462.96 and 410,111.76

Step by Step Solution

1. Step 1: Write the proportion equation
   865,627.18 : 1,298,462.96 = 410,111.76 : x
2. Step 2: Convert to fraction form
   865,627.18/1,298,462.96 = 410,111.76/x
3. Step 3: Cross multiply
   865,627.18x = 1,298,462.96 × 410,111.76
4. Step 4: Simplify right side
   865,627.18x = 532,514,931,016.01
5. Step 5: Solve for x
   x = 532,514,931,016.01/865,627.18
6. Step 6: Final answer
   x = 615,178.15