Finding the Fourth Proportional to 10,081.64, 13,911.87 and 5,605.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,081.64 : 13,911.87 = 5,605.12 : x
2. Step 2: Convert to fraction form
   10,081.64/13,911.87 = 5,605.12/x
3. Step 3: Cross multiply
   10,081.64x = 13,911.87 × 5,605.12
4. Step 4: Simplify right side
   10,081.64x = 77,977,700.77
5. Step 5: Solve for x
   x = 77,977,700.77/10,081.64
6. Step 6: Final answer
   x = 7,734.62