Finding the Fourth Proportional to 991,200.24, 1,367,812.32 and 561,471.72

Step by Step Solution

1. Step 1: Write the proportion equation
   991,200.24 : 1,367,812.32 = 561,471.72 : x
2. Step 2: Convert to fraction form
   991,200.24/1,367,812.32 = 561,471.72/x
3. Step 3: Cross multiply
   991,200.24x = 1,367,812.32 × 561,471.72
4. Step 4: Simplify right side
   991,200.24x = 767,987,935,947.59
5. Step 5: Solve for x
   x = 767,987,935,947.59/991,200.24
6. Step 6: Final answer
   x = 774,806.04