Finding the Fourth Proportional to 10,085.40, 13,916.78 and 5,608.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,085.40 : 13,916.78 = 5,608.43 : x
2. Step 2: Convert to fraction form
   10,085.40/13,916.78 = 5,608.43/x
3. Step 3: Cross multiply
   10,085.40x = 13,916.78 × 5,608.43
4. Step 4: Simplify right side
   10,085.40x = 78,051,262.05
5. Step 5: Solve for x
   x = 78,051,262.05/10,085.40
6. Step 6: Final answer
   x = 7,739.03