Finding the Fourth Proportional to 43,081.92, 64,623.69 and 13,499.10

Step by Step Solution

1. Step 1: Write the proportion equation
   43,081.92 : 64,623.69 = 13,499.10 : x
2. Step 2: Convert to fraction form
   43,081.92/64,623.69 = 13,499.10/x
3. Step 3: Cross multiply
   43,081.92x = 64,623.69 × 13,499.10
4. Step 4: Simplify right side
   43,081.92x = 872,361,653.68
5. Step 5: Solve for x
   x = 872,361,653.68/43,081.92
6. Step 6: Final answer
   x = 20,248.90