Finding the Fourth Proportional to 10,087.71, 13,920.82 and 5,611.24

Step by Step Solution

1. Step 1: Write the proportion equation
   10,087.71 : 13,920.82 = 5,611.24 : x
2. Step 2: Convert to fraction form
   10,087.71/13,920.82 = 5,611.24/x
3. Step 3: Cross multiply
   10,087.71x = 13,920.82 × 5,611.24
4. Step 4: Simplify right side
   10,087.71x = 78,113,062.02
5. Step 5: Solve for x
   x = 78,113,062.02/10,087.71
6. Step 6: Final answer
   x = 7,743.39