Finding the Fourth Proportional to 2,660,233.30, 3,990,933.15 and 862,810.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660,233.30 : 3,990,933.15 = 862,810.90 : x
2. Step 2: Convert to fraction form
   2,660,233.30/3,990,933.15 = 862,810.90/x
3. Step 3: Cross multiply
   2,660,233.30x = 3,990,933.15 × 862,810.90
4. Step 4: Simplify right side
   2,660,233.30x = 3,443,420,622,991.34
5. Step 5: Solve for x
   x = 3,443,420,622,991.34/2,660,233.30
6. Step 6: Final answer
   x = 1,294,405.50