Finding the Fourth Proportional to 6,790.80, 10,196.72 and 4,210.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,790.80 : 10,196.72 = 4,210.12 : x
2. Step 2: Convert to fraction form
   6,790.80/10,196.72 = 4,210.12/x
3. Step 3: Cross multiply
   6,790.80x = 10,196.72 × 4,210.12
4. Step 4: Simplify right side
   6,790.80x = 42,929,414.81
5. Step 5: Solve for x
   x = 42,929,414.81/6,790.80
6. Step 6: Final answer
   x = 6,321.70