Finding the Fourth Proportional to 1,499.34, 2,248.40 and 621.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.34 : 2,248.40 = 621.98 : x
2. Step 2: Convert to fraction form
   1,499.34/2,248.40 = 621.98/x
3. Step 3: Cross multiply
   1,499.34x = 2,248.40 × 621.98
4. Step 4: Simplify right side
   1,499.34x = 1,398,459.83
5. Step 5: Solve for x
   x = 1,398,459.83/1,499.34
6. Step 6: Final answer
   x = 932.72