Finding the Fourth Proportional to 1,667.50, 2,498.61 and 1,117.66

Step by Step Solution

1. Step 1: Write the proportion equation
   1,667.50 : 2,498.61 = 1,117.66 : x
2. Step 2: Convert to fraction form
   1,667.50/2,498.61 = 1,117.66/x
3. Step 3: Cross multiply
   1,667.50x = 2,498.61 × 1,117.66
4. Step 4: Simplify right side
   1,667.50x = 2,792,596.45
5. Step 5: Solve for x
   x = 2,792,596.45/1,667.50
6. Step 6: Final answer
   x = 1,674.72