Finding the Fourth Proportional to 2,124.30, 3,185.61 and 663.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.30 : 3,185.61 = 663.06 : x
2. Step 2: Convert to fraction form
   2,124.30/3,185.61 = 663.06/x
3. Step 3: Cross multiply
   2,124.30x = 3,185.61 × 663.06
4. Step 4: Simplify right side
   2,124.30x = 2,112,250.57
5. Step 5: Solve for x
   x = 2,112,250.57/2,124.30
6. Step 6: Final answer
   x = 994.33