Finding the Fourth Proportional to 10,065.57, 13,889.84 and 5,589.33

Step by Step Solution

1. Step 1: Write the proportion equation
   10,065.57 : 13,889.84 = 5,589.33 : x
2. Step 2: Convert to fraction form
   10,065.57/13,889.84 = 5,589.33/x
3. Step 3: Cross multiply
   10,065.57x = 13,889.84 × 5,589.33
4. Step 4: Simplify right side
   10,065.57x = 77,634,871.46
5. Step 5: Solve for x
   x = 77,634,871.46/10,065.57
6. Step 6: Final answer
   x = 7,712.91