Finding the Fourth Proportional to 5,139.15, 7,702.34 and 2,672.52

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139.15 : 7,702.34 = 2,672.52 : x
2. Step 2: Convert to fraction form
   5,139.15/7,702.34 = 2,672.52/x
3. Step 3: Cross multiply
   5,139.15x = 7,702.34 × 2,672.52
4. Step 4: Simplify right side
   5,139.15x = 20,584,644.33
5. Step 5: Solve for x
   x = 20,584,644.33/5,139.15
6. Step 6: Final answer
   x = 4,005.46