Finding the Fourth Proportional to 1,632.18, 2,451.15 and 1,215.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,632.18 : 2,451.15 = 1,215.83 : x
2. Step 2: Convert to fraction form
   1,632.18/2,451.15 = 1,215.83/x
3. Step 3: Cross multiply
   1,632.18x = 2,451.15 × 1,215.83
4. Step 4: Simplify right side
   1,632.18x = 2,980,187.83
5. Step 5: Solve for x
   x = 2,980,187.83/1,632.18
6. Step 6: Final answer
   x = 1,825.89