Finding the Fourth Proportional to 2,300.20, 3,442.06 and 2,145.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,300.20 : 3,442.06 = 2,145.72 : x
2. Step 2: Convert to fraction form
   2,300.20/3,442.06 = 2,145.72/x
3. Step 3: Cross multiply
   2,300.20x = 3,442.06 × 2,145.72
4. Step 4: Simplify right side
   2,300.20x = 7,385,712.57
5. Step 5: Solve for x
   x = 7,385,712.57/2,300.20
6. Step 6: Final answer
   x = 3,210.90