Finding the Fourth Proportional to 1,499.23, 2,248.83 and 621.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.23 : 2,248.83 = 621.55 : x
2. Step 2: Convert to fraction form
   1,499.23/2,248.83 = 621.55/x
3. Step 3: Cross multiply
   1,499.23x = 2,248.83 × 621.55
4. Step 4: Simplify right side
   1,499.23x = 1,397,760.29
5. Step 5: Solve for x
   x = 1,397,760.29/1,499.23
6. Step 6: Final answer
   x = 932.32