Finding the Fourth Proportional to 1,458.88, 2,187.90 and 484.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,458.88 : 2,187.90 = 484.72 : x
2. Step 2: Convert to fraction form
   1,458.88/2,187.90 = 484.72/x
3. Step 3: Cross multiply
   1,458.88x = 2,187.90 × 484.72
4. Step 4: Simplify right side
   1,458.88x = 1,060,518.89
5. Step 5: Solve for x
   x = 1,060,518.89/1,458.88
6. Step 6: Final answer
   x = 726.94