Finding the Fourth Proportional to 81,608.65, 122,314.51 and 42,144.19

Step by Step Solution

1. Step 1: Write the proportion equation
   81,608.65 : 122,314.51 = 42,144.19 : x
2. Step 2: Convert to fraction form
   81,608.65/122,314.51 = 42,144.19/x
3. Step 3: Cross multiply
   81,608.65x = 122,314.51 × 42,144.19
4. Step 4: Simplify right side
   81,608.65x = 5,154,845,949.20
5. Step 5: Solve for x
   x = 5,154,845,949.20/81,608.65
6. Step 6: Final answer
   x = 63,165.44