Finding the Fourth Proportional to 2,448.06, 3,670.89 and 1,215.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,448.06 : 3,670.89 = 1,215.78 : x
2. Step 2: Convert to fraction form
   2,448.06/3,670.89 = 1,215.78/x
3. Step 3: Cross multiply
   2,448.06x = 3,670.89 × 1,215.78
4. Step 4: Simplify right side
   2,448.06x = 4,462,994.64
5. Step 5: Solve for x
   x = 4,462,994.64/2,448.06
6. Step 6: Final answer
   x = 1,823.07