Finding the Fourth Proportional to 9,017.85, 12,499.18 and 8,498.74

Step by Step Solution

1. Step 1: Write the proportion equation
   9,017.85 : 12,499.18 = 8,498.74 : x
2. Step 2: Convert to fraction form
   9,017.85/12,499.18 = 8,498.74/x
3. Step 3: Cross multiply
   9,017.85x = 12,499.18 × 8,498.74
4. Step 4: Simplify right side
   9,017.85x = 106,227,281.03
5. Step 5: Solve for x
   x = 106,227,281.03/9,017.85
6. Step 6: Final answer
   x = 11,779.67