Finding the Fourth Proportional to 2,660,219.30, 3,990,912.15 and 862,796.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,660,219.30 : 3,990,912.15 = 862,796.90 : x
2. Step 2: Convert to fraction form
   2,660,219.30/3,990,912.15 = 862,796.90/x
3. Step 3: Cross multiply
   2,660,219.30x = 3,990,912.15 × 862,796.90
4. Step 4: Simplify right side
   2,660,219.30x = 3,443,346,631,192.34
5. Step 5: Solve for x
   x = 3,443,346,631,192.34/2,660,219.30
6. Step 6: Final answer
   x = 1,294,384.50