Finding the Fourth Proportional to 78,216.54, 107,910.54 and 51,373.60

Step by Step Solution

1. Step 1: Write the proportion equation
   78,216.54 : 107,910.54 = 51,373.60 : x
2. Step 2: Convert to fraction form
   78,216.54/107,910.54 = 51,373.60/x
3. Step 3: Cross multiply
   78,216.54x = 107,910.54 × 51,373.60
4. Step 4: Simplify right side
   78,216.54x = 5,543,752,917.74
5. Step 5: Solve for x
   x = 5,543,752,917.74/78,216.54
6. Step 6: Final answer
   x = 70,876.99