Finding the Fourth Proportional to 2,145.57, 3,213.54 and 1,864.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,145.57 : 3,213.54 = 1,864.32 : x
2. Step 2: Convert to fraction form
   2,145.57/3,213.54 = 1,864.32/x
3. Step 3: Cross multiply
   2,145.57x = 3,213.54 × 1,864.32
4. Step 4: Simplify right side
   2,145.57x = 5,991,066.89
5. Step 5: Solve for x
   x = 5,991,066.89/2,145.57
6. Step 6: Final answer
   x = 2,792.30