Finding the Fourth Proportional to 7,876.89, 10,871.31 and 5,985.39

Step by Step Solution

1. Step 1: Write the proportion equation
   7,876.89 : 10,871.31 = 5,985.39 : x
2. Step 2: Convert to fraction form
   7,876.89/10,871.31 = 5,985.39/x
3. Step 3: Cross multiply
   7,876.89x = 10,871.31 × 5,985.39
4. Step 4: Simplify right side
   7,876.89x = 65,069,030.16
5. Step 5: Solve for x
   x = 65,069,030.16/7,876.89
6. Step 6: Final answer
   x = 8,260.75