Finding the Fourth Proportional to 10,082.45, 13,912.47 and 5,605.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,082.45 : 13,912.47 = 5,605.31 : x
2. Step 2: Convert to fraction form
   10,082.45/13,912.47 = 5,605.31/x
3. Step 3: Cross multiply
   10,082.45x = 13,912.47 × 5,605.31
4. Step 4: Simplify right side
   10,082.45x = 77,983,742.00
5. Step 5: Solve for x
   x = 77,983,742.00/10,082.45
6. Step 6: Final answer
   x = 7,734.60