Finding the Fourth Proportional to 10,087.47, 13,920.76 and 5,610.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,087.47 : 13,920.76 = 5,610.80 : x
2. Step 2: Convert to fraction form
   10,087.47/13,920.76 = 5,610.80/x
3. Step 3: Cross multiply
   10,087.47x = 13,920.76 × 5,610.80
4. Step 4: Simplify right side
   10,087.47x = 78,106,642.02
5. Step 5: Solve for x
   x = 78,106,642.02/10,087.47
6. Step 6: Final answer
   x = 7,742.94