Finding the Fourth Proportional to 1,629.12, 2,248.48 and 930.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,629.12 : 2,248.48 = 930.72 : x
2. Step 2: Convert to fraction form
   1,629.12/2,248.48 = 930.72/x
3. Step 3: Cross multiply
   1,629.12x = 2,248.48 × 930.72
4. Step 4: Simplify right side
   1,629.12x = 2,092,705.31
5. Step 5: Solve for x
   x = 2,092,705.31/1,629.12
6. Step 6: Final answer
   x = 1,284.56