Finding the Fourth Proportional to 78,105.78, 107,802.77 and 50,915.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78,105.78 : 107,802.77 = 50,915.84 : x
2. Step 2: Convert to fraction form
   78,105.78/107,802.77 = 50,915.84/x
3. Step 3: Cross multiply
   78,105.78x = 107,802.77 × 50,915.84
4. Step 4: Simplify right side
   78,105.78x = 5,488,867,795.28
5. Step 5: Solve for x
   x = 5,488,867,795.28/78,105.78
6. Step 6: Final answer
   x = 70,274.80