Finding the Fourth Proportional to 2,175.90, 3,002.52 and 1,218.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,175.90 : 3,002.52 = 1,218.63 : x
2. Step 2: Convert to fraction form
   2,175.90/3,002.52 = 1,218.63/x
3. Step 3: Cross multiply
   2,175.90x = 3,002.52 × 1,218.63
4. Step 4: Simplify right side
   2,175.90x = 3,658,960.95
5. Step 5: Solve for x
   x = 3,658,960.95/2,175.90
6. Step 6: Final answer
   x = 1,681.59