Finding the Fourth Proportional to 2,128.96, 3,191.27 and 1,348.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.96 : 3,191.27 = 1,348.72 : x
2. Step 2: Convert to fraction form
   2,128.96/3,191.27 = 1,348.72/x
3. Step 3: Cross multiply
   2,128.96x = 3,191.27 × 1,348.72
4. Step 4: Simplify right side
   2,128.96x = 4,304,113.72
5. Step 5: Solve for x
   x = 4,304,113.72/2,128.96
6. Step 6: Final answer
   x = 2,021.70