Finding the Fourth Proportional to 1,666.92, 2,300.44 and 1,003.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.92 : 2,300.44 = 1,003.98 : x
2. Step 2: Convert to fraction form
   1,666.92/2,300.44 = 1,003.98/x
3. Step 3: Cross multiply
   1,666.92x = 2,300.44 × 1,003.98
4. Step 4: Simplify right side
   1,666.92x = 2,309,595.75
5. Step 5: Solve for x
   x = 2,309,595.75/1,666.92
6. Step 6: Final answer
   x = 1,385.55