Finding the Fourth Proportional to 10,143.68, 13,996.88 and 5,666.87

Step by Step Solution

1. Step 1: Write the proportion equation
   10,143.68 : 13,996.88 = 5,666.87 : x
2. Step 2: Convert to fraction form
   10,143.68/13,996.88 = 5,666.87/x
3. Step 3: Cross multiply
   10,143.68x = 13,996.88 × 5,666.87
4. Step 4: Simplify right side
   10,143.68x = 79,318,499.37
5. Step 5: Solve for x
   x = 79,318,499.37/10,143.68
6. Step 6: Final answer
   x = 7,819.50