Finding the Fourth Proportional to 2,820.32, 3,892.56 and 1,641.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.32 : 3,892.56 = 1,641.68 : x
2. Step 2: Convert to fraction form
   2,820.32/3,892.56 = 1,641.68/x
3. Step 3: Cross multiply
   2,820.32x = 3,892.56 × 1,641.68
4. Step 4: Simplify right side
   2,820.32x = 6,390,337.90
5. Step 5: Solve for x
   x = 6,390,337.90/2,820.32
6. Step 6: Final answer
   x = 2,265.82