Finding the Fourth Proportional to 1,667.46, 2,300.13 and 1,218.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.46 : 2,300.13 = 1,218.75 : x
2. Step 2: Convert to fraction form
   1,667.46/2,300.13 = 1,218.75/x
3. Step 3: Cross multiply
   1,667.46x = 2,300.13 × 1,218.75
4. Step 4: Simplify right side
   1,667.46x = 2,803,283.44
5. Step 5: Solve for x
   x = 2,803,283.44/1,667.46
6. Step 6: Final answer
   x = 1,681.17