Finding the Fourth Proportional to 315,018.89, 472,530.05 and 78,361.58

Step by Step Solution

1. Step 1: Write the proportion equation
   315,018.89 : 472,530.05 = 78,361.58 : x
2. Step 2: Convert to fraction form
   315,018.89/472,530.05 = 78,361.58/x
3. Step 3: Cross multiply
   315,018.89x = 472,530.05 × 78,361.58
4. Step 4: Simplify right side
   315,018.89x = 37,028,198,561.02
5. Step 5: Solve for x
   x = 37,028,198,561.02/315,018.89
6. Step 6: Final answer
   x = 117,542.79