Finding the Fourth Proportional to 12,796.38, 19,201.86 and 4,478.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,796.38 : 19,201.86 = 4,478.19 : x
2. Step 2: Convert to fraction form
   12,796.38/19,201.86 = 4,478.19/x
3. Step 3: Cross multiply
   12,796.38x = 19,201.86 × 4,478.19
4. Step 4: Simplify right side
   12,796.38x = 85,989,505.43
5. Step 5: Solve for x
   x = 85,989,505.43/12,796.38
6. Step 6: Final answer
   x = 6,719.83