Finding the Fourth Proportional to 10,087.18, 13,920.34 and 5,611.22

Step by Step Solution

1. Step 1: Write the proportion equation
   10,087.18 : 13,920.34 = 5,611.22 : x
2. Step 2: Convert to fraction form
   10,087.18/13,920.34 = 5,611.22/x
3. Step 3: Cross multiply
   10,087.18x = 13,920.34 × 5,611.22
4. Step 4: Simplify right side
   10,087.18x = 78,110,090.21
5. Step 5: Solve for x
   x = 78,110,090.21/10,087.18
6. Step 6: Final answer
   x = 7,743.50