Finding the Fourth Proportional to 5,100.52, 7,038.21 and 3,111.57

Step by Step Solution

1. Step 1: Write the proportion equation
   5,100.52 : 7,038.21 = 3,111.57 : x
2. Step 2: Convert to fraction form
   5,100.52/7,038.21 = 3,111.57/x
3. Step 3: Cross multiply
   5,100.52x = 7,038.21 × 3,111.57
4. Step 4: Simplify right side
   5,100.52x = 21,899,847.90
5. Step 5: Solve for x
   x = 21,899,847.90/5,100.52
6. Step 6: Final answer
   x = 4,293.65