Finding the Fourth Proportional to 2,632.56, 3,948.83 and 989.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,632.56 : 3,948.83 = 989.88 : x
2. Step 2: Convert to fraction form
   2,632.56/3,948.83 = 989.88/x
3. Step 3: Cross multiply
   2,632.56x = 3,948.83 × 989.88
4. Step 4: Simplify right side
   2,632.56x = 3,908,862.89
5. Step 5: Solve for x
   x = 3,908,862.89/2,632.56
6. Step 6: Final answer
   x = 1,484.81