Finding the Fourth Proportional to 1,989.10, 2,981.79 and 948.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.10 : 2,981.79 = 948.59 : x
2. Step 2: Convert to fraction form
   1,989.10/2,981.79 = 948.59/x
3. Step 3: Cross multiply
   1,989.10x = 2,981.79 × 948.59
4. Step 4: Simplify right side
   1,989.10x = 2,828,481.27
5. Step 5: Solve for x
   x = 2,828,481.27/1,989.10
6. Step 6: Final answer
   x = 1,421.99