Finding the Fourth Proportional to 1,629.52, 2,248.78 and 921.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,629.52 : 2,248.78 = 921.39 : x
2. Step 2: Convert to fraction form
   1,629.52/2,248.78 = 921.39/x
3. Step 3: Cross multiply
   1,629.52x = 2,248.78 × 921.39
4. Step 4: Simplify right side
   1,629.52x = 2,071,992.67
5. Step 5: Solve for x
   x = 2,071,992.67/1,629.52
6. Step 6: Final answer
   x = 1,271.54