Finding the Fourth Proportional to 10,155.78, 15,230.24 and 3,915.29

Step by Step Solution

1. Step 1: Write the proportion equation
   10,155.78 : 15,230.24 = 3,915.29 : x
2. Step 2: Convert to fraction form
   10,155.78/15,230.24 = 3,915.29/x
3. Step 3: Cross multiply
   10,155.78x = 15,230.24 × 3,915.29
4. Step 4: Simplify right side
   10,155.78x = 59,630,710.64
5. Step 5: Solve for x
   x = 59,630,710.64/10,155.78
6. Step 6: Final answer
   x = 5,871.60