Finding the Fourth Proportional to 2,154.84, 2,973.51 and 1,223.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,154.84 : 2,973.51 = 1,223.34 : x
2. Step 2: Convert to fraction form
   2,154.84/2,973.51 = 1,223.34/x
3. Step 3: Cross multiply
   2,154.84x = 2,973.51 × 1,223.34
4. Step 4: Simplify right side
   2,154.84x = 3,637,613.72
5. Step 5: Solve for x
   x = 3,637,613.72/2,154.84
6. Step 6: Final answer
   x = 1,688.11