Finding the Fourth Proportional to 81,810.23, 122,806.46 and 42,356.75

Step by Step Solution

1. Step 1: Write the proportion equation
   81,810.23 : 122,806.46 = 42,356.75 : x
2. Step 2: Convert to fraction form
   81,810.23/122,806.46 = 42,356.75/x
3. Step 3: Cross multiply
   81,810.23x = 122,806.46 × 42,356.75
4. Step 4: Simplify right side
   81,810.23x = 5,201,682,016.46
5. Step 5: Solve for x
   x = 5,201,682,016.46/81,810.23
6. Step 6: Final answer
   x = 63,582.30