Finding the Fourth Proportional to 1,499.13, 2,247.72 and 621.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.13 : 2,247.72 = 621.39 : x
2. Step 2: Convert to fraction form
   1,499.13/2,247.72 = 621.39/x
3. Step 3: Cross multiply
   1,499.13x = 2,247.72 × 621.39
4. Step 4: Simplify right side
   1,499.13x = 1,396,710.73
5. Step 5: Solve for x
   x = 1,396,710.73/1,499.13
6. Step 6: Final answer
   x = 931.68