Finding the Fourth Proportional to 10,067.20, 13,892.81 and 5,591.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,067.20 : 13,892.81 = 5,591.02 : x
2. Step 2: Convert to fraction form
   10,067.20/13,892.81 = 5,591.02/x
3. Step 3: Cross multiply
   10,067.20x = 13,892.81 × 5,591.02
4. Step 4: Simplify right side
   10,067.20x = 77,674,978.57
5. Step 5: Solve for x
   x = 77,674,978.57/10,067.20
6. Step 6: Final answer
   x = 7,715.65