Finding the Fourth Proportional to 1,666.43, 2,299.76 and 1,003.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.43 : 2,299.76 = 1,003.31 : x
2. Step 2: Convert to fraction form
   1,666.43/2,299.76 = 1,003.31/x
3. Step 3: Cross multiply
   1,666.43x = 2,299.76 × 1,003.31
4. Step 4: Simplify right side
   1,666.43x = 2,307,372.21
5. Step 5: Solve for x
   x = 2,307,372.21/1,666.43
6. Step 6: Final answer
   x = 1,384.62