Finding the Fourth Proportional to 1,499.11, 2,248.76 and 459.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,499.11 : 2,248.76 = 459.15 : x
2. Step 2: Convert to fraction form
   1,499.11/2,248.76 = 459.15/x
3. Step 3: Cross multiply
   1,499.11x = 2,248.76 × 459.15
4. Step 4: Simplify right side
   1,499.11x = 1,032,518.15
5. Step 5: Solve for x
   x = 1,032,518.15/1,499.11
6. Step 6: Final answer
   x = 688.75