Finding the Fourth Proportional to 81,968.10, 122,952.15 and 42,602.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,968.10 : 122,952.15 = 42,602.10 : x
2. Step 2: Convert to fraction form
   81,968.10/122,952.15 = 42,602.10/x
3. Step 3: Cross multiply
   81,968.10x = 122,952.15 × 42,602.10
4. Step 4: Simplify right side
   81,968.10x = 5,238,019,789.52
5. Step 5: Solve for x
   x = 5,238,019,789.52/81,968.10
6. Step 6: Final answer
   x = 63,903.15