Finding the Fourth Proportional to 10,066.65, 13,892.59 and 5,590.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,066.65 : 13,892.59 = 5,590.43 : x
2. Step 2: Convert to fraction form
   10,066.65/13,892.59 = 5,590.43/x
3. Step 3: Cross multiply
   10,066.65x = 13,892.59 × 5,590.43
4. Step 4: Simplify right side
   10,066.65x = 77,665,503.21
5. Step 5: Solve for x
   x = 77,665,503.21/10,066.65
6. Step 6: Final answer
   x = 7,715.13