Finding the Fourth Proportional to 81,811.38, 122,556.69 and 42,394.35

Step by Step Solution

1. Step 1: Write the proportion equation
   81,811.38 : 122,556.69 = 42,394.35 : x
2. Step 2: Convert to fraction form
   81,811.38/122,556.69 = 42,394.35/x
3. Step 3: Cross multiply
   81,811.38x = 122,556.69 × 42,394.35
4. Step 4: Simplify right side
   81,811.38x = 5,195,711,210.70
5. Step 5: Solve for x
   x = 5,195,711,210.70/81,811.38
6. Step 6: Final answer
   x = 63,508.42