Finding the Fourth Proportional to 10,065.88, 13,889.32 and 5,589.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,065.88 : 13,889.32 = 5,589.55 : x
2. Step 2: Convert to fraction form
   10,065.88/13,889.32 = 5,589.55/x
3. Step 3: Cross multiply
   10,065.88x = 13,889.32 × 5,589.55
4. Step 4: Simplify right side
   10,065.88x = 77,635,048.61
5. Step 5: Solve for x
   x = 77,635,048.61/10,065.88
6. Step 6: Final answer
   x = 7,712.69