Finding the Fourth Proportional to 10,065.34, 13,890.20 and 5,589.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,065.34 : 13,890.20 = 5,589.10 : x
2. Step 2: Convert to fraction form
   10,065.34/13,890.20 = 5,589.10/x
3. Step 3: Cross multiply
   10,065.34x = 13,890.20 × 5,589.10
4. Step 4: Simplify right side
   10,065.34x = 77,633,716.82
5. Step 5: Solve for x
   x = 77,633,716.82/10,065.34
6. Step 6: Final answer
   x = 7,712.98