Finding the Fourth Proportional to 9,411.16, 12,987.50 and 5,219.68

Step by Step Solution

1. Step 1: Write the proportion equation
   9,411.16 : 12,987.50 = 5,219.68 : x
2. Step 2: Convert to fraction form
   9,411.16/12,987.50 = 5,219.68/x
3. Step 3: Cross multiply
   9,411.16x = 12,987.50 × 5,219.68
4. Step 4: Simplify right side
   9,411.16x = 67,790,594
5. Step 5: Solve for x
   x = 67,790,594/9,411.16
6. Step 6: Final answer
   x = 7,203.21