Finding the Fourth Proportional to 2,488.30, 3,732.50 and 821.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,488.30 : 3,732.50 = 821.88 : x
2. Step 2: Convert to fraction form
   2,488.30/3,732.50 = 821.88/x
3. Step 3: Cross multiply
   2,488.30x = 3,732.50 × 821.88
4. Step 4: Simplify right side
   2,488.30x = 3,067,667.10
5. Step 5: Solve for x
   x = 3,067,667.10/2,488.30
6. Step 6: Final answer
   x = 1,232.84