Finding the Fourth Proportional to 13,297.78, 19,946.62 and 3,937.87

Step by Step Solution

1. Step 1: Write the proportion equation
   13,297.78 : 19,946.62 = 3,937.87 : x
2. Step 2: Convert to fraction form
   13,297.78/19,946.62 = 3,937.87/x
3. Step 3: Cross multiply
   13,297.78x = 19,946.62 × 3,937.87
4. Step 4: Simplify right side
   13,297.78x = 78,547,196.50
5. Step 5: Solve for x
   x = 78,547,196.50/13,297.78
6. Step 6: Final answer
   x = 5,906.79