Finding the Fourth Proportional to 2,199.74, 3,300.78 and 1,615.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,199.74 : 3,300.78 = 1,615.88 : x
2. Step 2: Convert to fraction form
   2,199.74/3,300.78 = 1,615.88/x
3. Step 3: Cross multiply
   2,199.74x = 3,300.78 × 1,615.88
4. Step 4: Simplify right side
   2,199.74x = 5,333,664.39
5. Step 5: Solve for x
   x = 5,333,664.39/2,199.74
6. Step 6: Final answer
   x = 2,424.68