Finding the Fourth Proportional to 81,770.10, 122,659.20 and 42,404.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,770.10 : 122,659.20 = 42,404.10 : x
2. Step 2: Convert to fraction form
   81,770.10/122,659.20 = 42,404.10/x
3. Step 3: Cross multiply
   81,770.10x = 122,659.20 × 42,404.10
4. Step 4: Simplify right side
   81,770.10x = 5,201,252,982.72
5. Step 5: Solve for x
   x = 5,201,252,982.72/81,770.10
6. Step 6: Final answer
   x = 63,608.25