Finding the Fourth Proportional to 1,667.31, 2,300.90 and 1,004.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.31 : 2,300.90 = 1,004.19 : x
2. Step 2: Convert to fraction form
   1,667.31/2,300.90 = 1,004.19/x
3. Step 3: Cross multiply
   1,667.31x = 2,300.90 × 1,004.19
4. Step 4: Simplify right side
   1,667.31x = 2,310,540.77
5. Step 5: Solve for x
   x = 2,310,540.77/1,667.31
6. Step 6: Final answer
   x = 1,385.79