Finding the Fourth Proportional to 81,767.10, 122,654.70 and 42,401.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,767.10 : 122,654.70 = 42,401.10 : x
2. Step 2: Convert to fraction form
   81,767.10/122,654.70 = 42,401.10/x
3. Step 3: Cross multiply
   81,767.10x = 122,654.70 × 42,401.10
4. Step 4: Simplify right side
   81,767.10x = 5,200,694,200.17
5. Step 5: Solve for x
   x = 5,200,694,200.17/81,767.10
6. Step 6: Final answer
   x = 63,603.75