Finding the Fourth Proportional to 72,128.22, 108,150.30 and 34,671.48

Step by Step Solution

1. Step 1: Write the proportion equation
   72,128.22 : 108,150.30 = 34,671.48 : x
2. Step 2: Convert to fraction form
   72,128.22/108,150.30 = 34,671.48/x
3. Step 3: Cross multiply
   72,128.22x = 108,150.30 × 34,671.48
4. Step 4: Simplify right side
   72,128.22x = 3,749,730,963.44
5. Step 5: Solve for x
   x = 3,749,730,963.44/72,128.22
6. Step 6: Final answer
   x = 51,987.02