Finding the Fourth Proportional to 1,423.17, 2,123.97 and 1,386.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.17 : 2,123.97 = 1,386.27 : x
2. Step 2: Convert to fraction form
   1,423.17/2,123.97 = 1,386.27/x
3. Step 3: Cross multiply
   1,423.17x = 2,123.97 × 1,386.27
4. Step 4: Simplify right side
   1,423.17x = 2,944,395.89
5. Step 5: Solve for x
   x = 2,944,395.89/1,423.17
6. Step 6: Final answer
   x = 2,068.90