Finding the Fourth Proportional to 7,877.25, 10,870.74 and 5,087.61

Step by Step Solution

1. Step 1: Write the proportion equation
   7,877.25 : 10,870.74 = 5,087.61 : x
2. Step 2: Convert to fraction form
   7,877.25/10,870.74 = 5,087.61/x
3. Step 3: Cross multiply
   7,877.25x = 10,870.74 × 5,087.61
4. Step 4: Simplify right side
   7,877.25x = 55,306,085.53
5. Step 5: Solve for x
   x = 55,306,085.53/7,877.25
6. Step 6: Final answer
   x = 7,020.99