Finding the Fourth Proportional to 12,915.72, 19,374.30 and 3,681

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915.72 : 19,374.30 = 3,681 : x
2. Step 2: Convert to fraction form
   12,915.72/19,374.30 = 3,681/x
3. Step 3: Cross multiply
   12,915.72x = 19,374.30 × 3,681
4. Step 4: Simplify right side
   12,915.72x = 71,316,798.30
5. Step 5: Solve for x
   x = 71,316,798.30/12,915.72
6. Step 6: Final answer
   x = 5,521.71