Finding the Fourth Proportional to 10,087.91, 13,920.98 and 5,611.53

Step by Step Solution

1. Step 1: Write the proportion equation
   10,087.91 : 13,920.98 = 5,611.53 : x
2. Step 2: Convert to fraction form
   10,087.91/13,920.98 = 5,611.53/x
3. Step 3: Cross multiply
   10,087.91x = 13,920.98 × 5,611.53
4. Step 4: Simplify right side
   10,087.91x = 78,117,968.84
5. Step 5: Solve for x
   x = 78,117,968.84/10,087.91
6. Step 6: Final answer
   x = 7,743.73