Finding the Fourth Proportional to 10,580.14, 15,871.60 and 3,915.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,580.14 : 15,871.60 = 3,915.72 : x
2. Step 2: Convert to fraction form
   10,580.14/15,871.60 = 3,915.72/x
3. Step 3: Cross multiply
   10,580.14x = 15,871.60 × 3,915.72
4. Step 4: Simplify right side
   10,580.14x = 62,148,741.55
5. Step 5: Solve for x
   x = 62,148,741.55/10,580.14
6. Step 6: Final answer
   x = 5,874.09