Finding the Fourth Proportional to 1,008,306.72, 1,391,400.72 and 578,622.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008,306.72 : 1,391,400.72 = 578,622.24 : x
2. Step 2: Convert to fraction form
   1,008,306.72/1,391,400.72 = 578,622.24/x
3. Step 3: Cross multiply
   1,008,306.72x = 1,391,400.72 × 578,622.24
4. Step 4: Simplify right side
   1,008,306.72x = 805,095,401,344.01
5. Step 5: Solve for x
   x = 805,095,401,344.01/1,008,306.72
6. Step 6: Final answer
   x = 798,462.79