Finding the Fourth Proportional to 1,667.14, 2,300.80 and 1,003.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.14 : 2,300.80 = 1,003.90 : x
2. Step 2: Convert to fraction form
   1,667.14/2,300.80 = 1,003.90/x
3. Step 3: Cross multiply
   1,667.14x = 2,300.80 × 1,003.90
4. Step 4: Simplify right side
   1,667.14x = 2,309,773.12
5. Step 5: Solve for x
   x = 2,309,773.12/1,667.14
6. Step 6: Final answer
   x = 1,385.47