Finding the Fourth Proportional to 12,915.08, 19,370.54 and 3,678.92

Step by Step Solution

1. Step 1: Write the proportion equation
   12,915.08 : 19,370.54 = 3,678.92 : x
2. Step 2: Convert to fraction form
   12,915.08/19,370.54 = 3,678.92/x
3. Step 3: Cross multiply
   12,915.08x = 19,370.54 × 3,678.92
4. Step 4: Simplify right side
   12,915.08x = 71,262,667.02
5. Step 5: Solve for x
   x = 71,262,667.02/12,915.08
6. Step 6: Final answer
   x = 5,517.79