Finding the Fourth Proportional to 10,081.78, 13,912.20 and 5,605.37

Step by Step Solution

1. Step 1: Write the proportion equation
   10,081.78 : 13,912.20 = 5,605.37 : x
2. Step 2: Convert to fraction form
   10,081.78/13,912.20 = 5,605.37/x
3. Step 3: Cross multiply
   10,081.78x = 13,912.20 × 5,605.37
4. Step 4: Simplify right side
   10,081.78x = 77,983,028.51
5. Step 5: Solve for x
   x = 77,983,028.51/10,081.78
6. Step 6: Final answer
   x = 7,735.05