Finding the Fourth Proportional to 2,140,074.72, 3,209,178.87 and 809,445.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,140,074.72 : 3,209,178.87 = 809,445.60 : x
2. Step 2: Convert to fraction form
   2,140,074.72/3,209,178.87 = 809,445.60/x
3. Step 3: Cross multiply
   2,140,074.72x = 3,209,178.87 × 809,445.60
4. Step 4: Simplify right side
   2,140,074.72x = 2,597,655,715,934.47
5. Step 5: Solve for x
   x = 2,597,655,715,934.47/2,140,074.72
6. Step 6: Final answer
   x = 1,213,815.43