Finding the Fourth Proportional to 2,591,986.30, 3,887,979.45 and 698,919.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,591,986.30 : 3,887,979.45 = 698,919.10 : x
2. Step 2: Convert to fraction form
   2,591,986.30/3,887,979.45 = 698,919.10/x
3. Step 3: Cross multiply
   2,591,986.30x = 3,887,979.45 × 698,919.10
4. Step 4: Simplify right side
   2,591,986.30x = 2,717,383,098,012.50
5. Step 5: Solve for x
   x = 2,717,383,098,012.50/2,591,986.30
6. Step 6: Final answer
   x = 1,048,378.65