Finding the Fourth Proportional to 1,667.58, 2,300.76 and 1,004.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.58 : 2,300.76 = 1,004.28 : x
2. Step 2: Convert to fraction form
   1,667.58/2,300.76 = 1,004.28/x
3. Step 3: Cross multiply
   1,667.58x = 2,300.76 × 1,004.28
4. Step 4: Simplify right side
   1,667.58x = 2,310,607.25
5. Step 5: Solve for x
   x = 2,310,607.25/1,667.58
6. Step 6: Final answer
   x = 1,385.61