Finding the Fourth Proportional to 2,660,034.71, 3,990,613.16 and 862,778.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660,034.71 : 3,990,613.16 = 862,778.61 : x
2. Step 2: Convert to fraction form
   2,660,034.71/3,990,613.16 = 862,778.61/x
3. Step 3: Cross multiply
   2,660,034.71x = 3,990,613.16 × 862,778.61
4. Step 4: Simplify right side
   2,660,034.71x = 3,443,015,677,389.45
5. Step 5: Solve for x
   x = 3,443,015,677,389.45/2,660,034.71
6. Step 6: Final answer
   x = 1,294,349.90