Finding the Fourth Proportional to 2,154.52, 2,973.18 and 1,223

Step by Step Solution

1. Step 1: Write the proportion equation
   2,154.52 : 2,973.18 = 1,223 : x
2. Step 2: Convert to fraction form
   2,154.52/2,973.18 = 1,223/x
3. Step 3: Cross multiply
   2,154.52x = 2,973.18 × 1,223
4. Step 4: Simplify right side
   2,154.52x = 3,636,199.14
5. Step 5: Solve for x
   x = 3,636,199.14/2,154.52
6. Step 6: Final answer
   x = 1,687.71