Finding the Fourth Proportional to 10,320.89, 14,242.91 and 5,605.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,320.89 : 14,242.91 = 5,605.20 : x
2. Step 2: Convert to fraction form
   10,320.89/14,242.91 = 5,605.20/x
3. Step 3: Cross multiply
   10,320.89x = 14,242.91 × 5,605.20
4. Step 4: Simplify right side
   10,320.89x = 79,834,331.11
5. Step 5: Solve for x
   x = 79,834,331.11/10,320.89
6. Step 6: Final answer
   x = 7,735.22