Finding the Fourth Proportional to 1,667.28, 2,299.76 and 1,003.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.28 : 2,299.76 = 1,003.68 : x
2. Step 2: Convert to fraction form
   1,667.28/2,299.76 = 1,003.68/x
3. Step 3: Cross multiply
   1,667.28x = 2,299.76 × 1,003.68
4. Step 4: Simplify right side
   1,667.28x = 2,308,223.12
5. Step 5: Solve for x
   x = 2,308,223.12/1,667.28
6. Step 6: Final answer
   x = 1,384.42