Finding the Fourth Proportional to 3,915.84, 5,403.42 and 2,424.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.84 : 5,403.42 = 2,424.72 : x
2. Step 2: Convert to fraction form
   3,915.84/5,403.42 = 2,424.72/x
3. Step 3: Cross multiply
   3,915.84x = 5,403.42 × 2,424.72
4. Step 4: Simplify right side
   3,915.84x = 13,101,780.54
5. Step 5: Solve for x
   x = 13,101,780.54/3,915.84
6. Step 6: Final answer
   x = 3,345.84