Finding the Fourth Proportional to 10,064.40, 13,889.31 and 5,588.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,064.40 : 13,889.31 = 5,588.21 : x
2. Step 2: Convert to fraction form
   10,064.40/13,889.31 = 5,588.21/x
3. Step 3: Cross multiply
   10,064.40x = 13,889.31 × 5,588.21
4. Step 4: Simplify right side
   10,064.40x = 77,616,381.04
5. Step 5: Solve for x
   x = 77,616,381.04/10,064.40
6. Step 6: Final answer
   x = 7,711.97