Finding the Fourth Proportional to 10,066.61, 13,891.94 and 5,590.36

Step by Step Solution

1. Step 1: Write the proportion equation
   10,066.61 : 13,891.94 = 5,590.36 : x
2. Step 2: Convert to fraction form
   10,066.61/13,891.94 = 5,590.36/x
3. Step 3: Cross multiply
   10,066.61x = 13,891.94 × 5,590.36
4. Step 4: Simplify right side
   10,066.61x = 77,660,928.33
5. Step 5: Solve for x
   x = 77,660,928.33/10,066.61
6. Step 6: Final answer
   x = 7,714.71