Finding the Fourth Proportional to 8,913.53, 12,302.71 and 5,138.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,913.53 : 12,302.71 = 5,138.89 : x
2. Step 2: Convert to fraction form
   8,913.53/12,302.71 = 5,138.89/x
3. Step 3: Cross multiply
   8,913.53x = 12,302.71 × 5,138.89
4. Step 4: Simplify right side
   8,913.53x = 63,222,229.79
5. Step 5: Solve for x
   x = 63,222,229.79/8,913.53
6. Step 6: Final answer
   x = 7,092.84