Finding the Fourth Proportional to 1,666.12, 2,298.18 and 1,003.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.12 : 2,298.18 = 1,003.18 : x
2. Step 2: Convert to fraction form
   1,666.12/2,298.18 = 1,003.18/x
3. Step 3: Cross multiply
   1,666.12x = 2,298.18 × 1,003.18
4. Step 4: Simplify right side
   1,666.12x = 2,305,488.21
5. Step 5: Solve for x
   x = 2,305,488.21/1,666.12
6. Step 6: Final answer
   x = 1,383.75