Finding the Fourth Proportional to 81,431.33, 122,142.33 and 48,361.46

Step by Step Solution

1. Step 1: Write the proportion equation
   81,431.33 : 122,142.33 = 48,361.46 : x
2. Step 2: Convert to fraction form
   81,431.33/122,142.33 = 48,361.46/x
3. Step 3: Cross multiply
   81,431.33x = 122,142.33 × 48,361.46
4. Step 4: Simplify right side
   81,431.33x = 5,906,980,795.89
5. Step 5: Solve for x
   x = 5,906,980,795.89/81,431.33
6. Step 6: Final answer
   x = 72,539.42