Finding the Fourth Proportional to 72,085.39, 108,139.32 and 34,638.48

Step by Step Solution

1. Step 1: Write the proportion equation
   72,085.39 : 108,139.32 = 34,638.48 : x
2. Step 2: Convert to fraction form
   72,085.39/108,139.32 = 34,638.48/x
3. Step 3: Cross multiply
   72,085.39x = 108,139.32 × 34,638.48
4. Step 4: Simplify right side
   72,085.39x = 3,745,781,673.03
5. Step 5: Solve for x
   x = 3,745,781,673.03/72,085.39
6. Step 6: Final answer
   x = 51,963.12