Finding the Fourth Proportional to 1,279,686.10, 1,920,191.55 and 522,082.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,279,686.10 : 1,920,191.55 = 522,082.90 : x
2. Step 2: Convert to fraction form
   1,279,686.10/1,920,191.55 = 522,082.90/x
3. Step 3: Cross multiply
   1,279,686.10x = 1,920,191.55 × 522,082.90
4. Step 4: Simplify right side
   1,279,686.10x = 1,002,499,172,979.50
5. Step 5: Solve for x
   x = 1,002,499,172,979.50/1,279,686.10
6. Step 6: Final answer
   x = 783,394.59