Finding the Fourth Proportional to 13,210.24, 19,814.88 and 3,976

Step by Step Solution

1. Step 1: Write the proportion equation
   13,210.24 : 19,814.88 = 3,976 : x
2. Step 2: Convert to fraction form
   13,210.24/19,814.88 = 3,976/x
3. Step 3: Cross multiply
   13,210.24x = 19,814.88 × 3,976
4. Step 4: Simplify right side
   13,210.24x = 78,783,962.88
5. Step 5: Solve for x
   x = 78,783,962.88/13,210.24
6. Step 6: Final answer
   x = 5,963.86