Finding the Fourth Proportional to 2,797,978.30, 4,197,700.89 and 878,811.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,797,978.30 : 4,197,700.89 = 878,811.99 : x
2. Step 2: Convert to fraction form
   2,797,978.30/4,197,700.89 = 878,811.99/x
3. Step 3: Cross multiply
   2,797,978.30x = 4,197,700.89 × 878,811.99
4. Step 4: Simplify right side
   2,797,978.30x = 3,688,989,872,565.67
5. Step 5: Solve for x
   x = 3,688,989,872,565.67/2,797,978.30
6. Step 6: Final answer
   x = 1,318,448.35