Finding the Fourth Proportional to 1,666.80, 2,300.28 and 1,003.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.80 : 2,300.28 = 1,003.92 : x
2. Step 2: Convert to fraction form
   1,666.80/2,300.28 = 1,003.92/x
3. Step 3: Cross multiply
   1,666.80x = 2,300.28 × 1,003.92
4. Step 4: Simplify right side
   1,666.80x = 2,309,297.10
5. Step 5: Solve for x
   x = 2,309,297.10/1,666.80
6. Step 6: Final answer
   x = 1,385.47