Finding the Fourth Proportional to 1,654.86, 2,480.56 and 1,215.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,654.86 : 2,480.56 = 1,215.46 : x
2. Step 2: Convert to fraction form
   1,654.86/2,480.56 = 1,215.46/x
3. Step 3: Cross multiply
   1,654.86x = 2,480.56 × 1,215.46
4. Step 4: Simplify right side
   1,654.86x = 3,015,012.22
5. Step 5: Solve for x
   x = 3,015,012.22/1,654.86
6. Step 6: Final answer
   x = 1,821.91