Finding the Fourth Proportional to 10,066.85, 13,891.77 and 5,590.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,066.85 : 13,891.77 = 5,590.88 : x
2. Step 2: Convert to fraction form
   10,066.85/13,891.77 = 5,590.88/x
3. Step 3: Cross multiply
   10,066.85x = 13,891.77 × 5,590.88
4. Step 4: Simplify right side
   10,066.85x = 77,667,149.60
5. Step 5: Solve for x
   x = 77,667,149.60/10,066.85
6. Step 6: Final answer
   x = 7,715.14