Finding the Fourth Proportional to 123,062.37, 169,828.29 and 72,111.75

Step by Step Solution

1. Step 1: Write the proportion equation
   123,062.37 : 169,828.29 = 72,111.75 : x
2. Step 2: Convert to fraction form
   123,062.37/169,828.29 = 72,111.75/x
3. Step 3: Cross multiply
   123,062.37x = 169,828.29 × 72,111.75
4. Step 4: Simplify right side
   123,062.37x = 12,246,615,191.41
5. Step 5: Solve for x
   x = 12,246,615,191.41/123,062.37
6. Step 6: Final answer
   x = 99,515.52