Finding the Fourth Proportional to 7,868.52, 10,851.30 and 5,177.16

Step by Step Solution

1. Step 1: Write the proportion equation
   7,868.52 : 10,851.30 = 5,177.16 : x
2. Step 2: Convert to fraction form
   7,868.52/10,851.30 = 5,177.16/x
3. Step 3: Cross multiply
   7,868.52x = 10,851.30 × 5,177.16
4. Step 4: Simplify right side
   7,868.52x = 56,178,916.31
5. Step 5: Solve for x
   x = 56,178,916.31/7,868.52
6. Step 6: Final answer
   x = 7,139.71