Finding the Fourth Proportional to 2,143.30, 3,007.10 and 2,143.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,143.30 : 3,007.10 = 2,143.30 : x
2. Step 2: Convert to fraction form
   2,143.30/3,007.10 = 2,143.30/x
3. Step 3: Cross multiply
   2,143.30x = 3,007.10 × 2,143.30
4. Step 4: Simplify right side
   2,143.30x = 6,445,117.43
5. Step 5: Solve for x
   x = 6,445,117.43/2,143.30
6. Step 6: Final answer
   x = 3,007.10