Finding the Fourth Proportional to 2,128.14, 3,192.90 and 958.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.14 : 3,192.90 = 958.76 : x
2. Step 2: Convert to fraction form
   2,128.14/3,192.90 = 958.76/x
3. Step 3: Cross multiply
   2,128.14x = 3,192.90 × 958.76
4. Step 4: Simplify right side
   2,128.14x = 3,061,224.80
5. Step 5: Solve for x
   x = 3,061,224.80/2,128.14
6. Step 6: Final answer
   x = 1,438.45