Finding the Fourth Proportional to 2,123.63, 2,929.90 and 1,284.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.63 : 2,929.90 = 1,284.60 : x
2. Step 2: Convert to fraction form
   2,123.63/2,929.90 = 1,284.60/x
3. Step 3: Cross multiply
   2,123.63x = 2,929.90 × 1,284.60
4. Step 4: Simplify right side
   2,123.63x = 3,763,749.54
5. Step 5: Solve for x
   x = 3,763,749.54/2,123.63
6. Step 6: Final answer
   x = 1,772.32