Finding the Fourth Proportional to 64,636.96, 89,162.56 and 38,788.80

Step by Step Solution

1. Step 1: Write the proportion equation
   64,636.96 : 89,162.56 = 38,788.80 : x
2. Step 2: Convert to fraction form
   64,636.96/89,162.56 = 38,788.80/x
3. Step 3: Cross multiply
   64,636.96x = 89,162.56 × 38,788.80
4. Step 4: Simplify right side
   64,636.96x = 3,458,508,707.33
5. Step 5: Solve for x
   x = 3,458,508,707.33/64,636.96
6. Step 6: Final answer
   x = 53,506.67