Finding the Fourth Proportional to 9,411.30, 12,987.59 and 5,219.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,411.30 : 12,987.59 = 5,219.55 : x
2. Step 2: Convert to fraction form
   9,411.30/12,987.59 = 5,219.55/x
3. Step 3: Cross multiply
   9,411.30x = 12,987.59 × 5,219.55
4. Step 4: Simplify right side
   9,411.30x = 67,789,375.38
5. Step 5: Solve for x
   x = 67,789,375.38/9,411.30
6. Step 6: Final answer
   x = 7,202.98