Finding the Fourth Proportional to 10,087.47, 13,920.32 and 5,611.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,087.47 : 13,920.32 = 5,611.07 : x
2. Step 2: Convert to fraction form
   10,087.47/13,920.32 = 5,611.07/x
3. Step 3: Cross multiply
   10,087.47x = 13,920.32 × 5,611.07
4. Step 4: Simplify right side
   10,087.47x = 78,107,938.77
5. Step 5: Solve for x
   x = 78,107,938.77/10,087.47
6. Step 6: Final answer
   x = 7,743.07