Finding the Fourth Proportional to 39,728.92, 59,580.72 and 13,068.81

Step by Step Solution

1. Step 1: Write the proportion equation
   39,728.92 : 59,580.72 = 13,068.81 : x
2. Step 2: Convert to fraction form
   39,728.92/59,580.72 = 13,068.81/x
3. Step 3: Cross multiply
   39,728.92x = 59,580.72 × 13,068.81
4. Step 4: Simplify right side
   39,728.92x = 778,649,109.34
5. Step 5: Solve for x
   x = 778,649,109.34/39,728.92
6. Step 6: Final answer
   x = 19,599.05