Finding the Fourth Proportional to 1,215.01, 1,821.61 and 484.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215.01 : 1,821.61 = 484.03 : x
2. Step 2: Convert to fraction form
   1,215.01/1,821.61 = 484.03/x
3. Step 3: Cross multiply
   1,215.01x = 1,821.61 × 484.03
4. Step 4: Simplify right side
   1,215.01x = 881,713.89
5. Step 5: Solve for x
   x = 881,713.89/1,215.01
6. Step 6: Final answer
   x = 725.68