Finding the Fourth Proportional to 105,078.88, 157,456.32 and 51,709.60

Step by Step Solution

1. Step 1: Write the proportion equation
   105,078.88 : 157,456.32 = 51,709.60 : x
2. Step 2: Convert to fraction form
   105,078.88/157,456.32 = 51,709.60/x
3. Step 3: Cross multiply
   105,078.88x = 157,456.32 × 51,709.60
4. Step 4: Simplify right side
   105,078.88x = 8,142,003,324.67
5. Step 5: Solve for x
   x = 8,142,003,324.67/105,078.88
6. Step 6: Final answer
   x = 77,484.68