Finding the Fourth Proportional to 13,270.53, 19,898.89 and 3,909.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,270.53 : 19,898.89 = 3,909.31 : x
2. Step 2: Convert to fraction form
   13,270.53/19,898.89 = 3,909.31/x
3. Step 3: Cross multiply
   13,270.53x = 19,898.89 × 3,909.31
4. Step 4: Simplify right side
   13,270.53x = 77,790,925.62
5. Step 5: Solve for x
   x = 77,790,925.62/13,270.53
6. Step 6: Final answer
   x = 5,861.93