Finding the Fourth Proportional to 123,085.39, 185,013.51 and 81,234.46

Step by Step Solution

1. Step 1: Write the proportion equation
   123,085.39 : 185,013.51 = 81,234.46 : x
2. Step 2: Convert to fraction form
   123,085.39/185,013.51 = 81,234.46/x
3. Step 3: Cross multiply
   123,085.39x = 185,013.51 × 81,234.46
4. Step 4: Simplify right side
   123,085.39x = 15,029,472,577.55
5. Step 5: Solve for x
   x = 15,029,472,577.55/123,085.39
6. Step 6: Final answer
   x = 122,106.06