Finding the Fourth Proportional to 10,065.46, 13,890.14 and 5,589.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,065.46 : 13,890.14 = 5,589.12 : x
2. Step 2: Convert to fraction form
   10,065.46/13,890.14 = 5,589.12/x
3. Step 3: Cross multiply
   10,065.46x = 13,890.14 × 5,589.12
4. Step 4: Simplify right side
   10,065.46x = 77,633,659.28
5. Step 5: Solve for x
   x = 77,633,659.28/10,065.46
6. Step 6: Final answer
   x = 7,712.88