Finding the Fourth Proportional to 2,300.40, 3,452.76 and 2,139.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,300.40 : 3,452.76 = 2,139.48 : x
2. Step 2: Convert to fraction form
   2,300.40/3,452.76 = 2,139.48/x
3. Step 3: Cross multiply
   2,300.40x = 3,452.76 × 2,139.48
4. Step 4: Simplify right side
   2,300.40x = 7,387,110.96
5. Step 5: Solve for x
   x = 7,387,110.96/2,300.40
6. Step 6: Final answer
   x = 3,211.23