Finding the Fourth Proportional to 5,011.27, 6,915.61 and 3,123.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,011.27 : 6,915.61 = 3,123.61 : x
2. Step 2: Convert to fraction form
   5,011.27/6,915.61 = 3,123.61/x
3. Step 3: Cross multiply
   5,011.27x = 6,915.61 × 3,123.61
4. Step 4: Simplify right side
   5,011.27x = 21,601,668.55
5. Step 5: Solve for x
   x = 21,601,668.55/5,011.27
6. Step 6: Final answer
   x = 4,310.62