Finding the Fourth Proportional to 7,251.48, 10,853.69 and 3,915.09

Step by Step Solution

1. Step 1: Write the proportion equation
   7,251.48 : 10,853.69 = 3,915.09 : x
2. Step 2: Convert to fraction form
   7,251.48/10,853.69 = 3,915.09/x
3. Step 3: Cross multiply
   7,251.48x = 10,853.69 × 3,915.09
4. Step 4: Simplify right side
   7,251.48x = 42,493,153.61
5. Step 5: Solve for x
   x = 42,493,153.61/7,251.48
6. Step 6: Final answer
   x = 5,859.93