Finding the Fourth Proportional to 991,211.98, 1,367,900.52 and 561,491.98

Step by Step Solution

1. Step 1: Write the proportion equation
   991,211.98 : 1,367,900.52 = 561,491.98 : x
2. Step 2: Convert to fraction form
   991,211.98/1,367,900.52 = 561,491.98/x
3. Step 3: Cross multiply
   991,211.98x = 1,367,900.52 × 561,491.98
4. Step 4: Simplify right side
   991,211.98x = 768,065,171,417.83
5. Step 5: Solve for x
   x = 768,065,171,417.83/991,211.98
6. Step 6: Final answer
   x = 774,874.79