Finding the Fourth Proportional to 81,770.82, 122,568.75 and 42,288.18

Step by Step Solution

1. Step 1: Write the proportion equation
   81,770.82 : 122,568.75 = 42,288.18 : x
2. Step 2: Convert to fraction form
   81,770.82/122,568.75 = 42,288.18/x
3. Step 3: Cross multiply
   81,770.82x = 122,568.75 × 42,288.18
4. Step 4: Simplify right side
   81,770.82x = 5,183,209,362.38
5. Step 5: Solve for x
   x = 5,183,209,362.38/81,770.82
6. Step 6: Final answer
   x = 63,387.03