Finding the Fourth Proportional to 9,411.50, 12,988.28 and 5,219.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,411.50 : 12,988.28 = 5,219.76 : x
2. Step 2: Convert to fraction form
   9,411.50/12,988.28 = 5,219.76/x
3. Step 3: Cross multiply
   9,411.50x = 12,988.28 × 5,219.76
4. Step 4: Simplify right side
   9,411.50x = 67,795,704.41
5. Step 5: Solve for x
   x = 67,795,704.41/9,411.50
6. Step 6: Final answer
   x = 7,203.50