Finding the Fourth Proportional to 72,609.78, 108,817.77 and 38,806.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,609.78 : 108,817.77 = 38,806.50 : x
2. Step 2: Convert to fraction form
   72,609.78/108,817.77 = 38,806.50/x
3. Step 3: Cross multiply
   72,609.78x = 108,817.77 × 38,806.50
4. Step 4: Simplify right side
   72,609.78x = 4,222,836,791.51
5. Step 5: Solve for x
   x = 4,222,836,791.51/72,609.78
6. Step 6: Final answer
   x = 58,157.96