Finding the Fourth Proportional to 13,270.72, 19,902.89 and 3,908.19

Step by Step Solution

1. Step 1: Write the proportion equation
   13,270.72 : 19,902.89 = 3,908.19 : x
2. Step 2: Convert to fraction form
   13,270.72/19,902.89 = 3,908.19/x
3. Step 3: Cross multiply
   13,270.72x = 19,902.89 × 3,908.19
4. Step 4: Simplify right side
   13,270.72x = 77,784,275.67
5. Step 5: Solve for x
   x = 77,784,275.67/13,270.72
6. Step 6: Final answer
   x = 5,861.35