Finding the Fourth Proportional to 2,154.50, 2,973.40 and 1,223.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,154.50 : 2,973.40 = 1,223.18 : x
2. Step 2: Convert to fraction form
   2,154.50/2,973.40 = 1,223.18/x
3. Step 3: Cross multiply
   2,154.50x = 2,973.40 × 1,223.18
4. Step 4: Simplify right side
   2,154.50x = 3,637,003.41
5. Step 5: Solve for x
   x = 3,637,003.41/2,154.50
6. Step 6: Final answer
   x = 1,688.10