Finding the Fourth Proportional to 650,978.20, 913,469 and 650,978.20

Step by Step Solution

1. Step 1: Write the proportion equation
   650,978.20 : 913,469 = 650,978.20 : x
2. Step 2: Convert to fraction form
   650,978.20/913,469 = 650,978.20/x
3. Step 3: Cross multiply
   650,978.20x = 913,469 × 650,978.20
4. Step 4: Simplify right side
   650,978.20x = 594,648,405,375.80
5. Step 5: Solve for x
   x = 594,648,405,375.80/650,978.20
6. Step 6: Final answer
   x = 913,469