Finding the Fourth Proportional to 10,087.56, 13,920.84 and 5,611.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,087.56 : 13,920.84 = 5,611.50 : x
2. Step 2: Convert to fraction form
   10,087.56/13,920.84 = 5,611.50/x
3. Step 3: Cross multiply
   10,087.56x = 13,920.84 × 5,611.50
4. Step 4: Simplify right side
   10,087.56x = 78,116,793.66
5. Step 5: Solve for x
   x = 78,116,793.66/10,087.56
6. Step 6: Final answer
   x = 7,743.87