Finding the Fourth Proportional to 10,087.76, 13,921.62 and 5,611.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,087.76 : 13,921.62 = 5,611.59 : x
2. Step 2: Convert to fraction form
   10,087.76/13,921.62 = 5,611.59/x
3. Step 3: Cross multiply
   10,087.76x = 13,921.62 × 5,611.59
4. Step 4: Simplify right side
   10,087.76x = 78,122,423.58
5. Step 5: Solve for x
   x = 78,122,423.58/10,087.76
6. Step 6: Final answer
   x = 7,744.28