Finding the Fourth Proportional to 8,720.34, 13,085.25 and 3,789.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,720.34 : 13,085.25 = 3,789.96 : x
2. Step 2: Convert to fraction form
   8,720.34/13,085.25 = 3,789.96/x
3. Step 3: Cross multiply
   8,720.34x = 13,085.25 × 3,789.96
4. Step 4: Simplify right side
   8,720.34x = 49,592,574.09
5. Step 5: Solve for x
   x = 49,592,574.09/8,720.34
6. Step 6: Final answer
   x = 5,687.00