Finding the Fourth Proportional to 8,899.84, 12,280.72 and 5,314.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,899.84 : 12,280.72 = 5,314.12 : x
2. Step 2: Convert to fraction form
   8,899.84/12,280.72 = 5,314.12/x
3. Step 3: Cross multiply
   8,899.84x = 12,280.72 × 5,314.12
4. Step 4: Simplify right side
   8,899.84x = 65,261,219.77
5. Step 5: Solve for x
   x = 65,261,219.77/8,899.84
6. Step 6: Final answer
   x = 7,332.85