Finding the Fourth Proportional to 81,811.73, 122,808.72 and 42,358.25

Step by Step Solution

1. Step 1: Write the proportion equation
   81,811.73 : 122,808.72 = 42,358.25 : x
2. Step 2: Convert to fraction form
   81,811.73/122,808.72 = 42,358.25/x
3. Step 3: Cross multiply
   81,811.73x = 122,808.72 × 42,358.25
4. Step 4: Simplify right side
   81,811.73x = 5,201,961,849.90
5. Step 5: Solve for x
   x = 5,201,961,849.90/81,811.73
6. Step 6: Final answer
   x = 63,584.55