Finding the Fourth Proportional to 78,106.78, 107,804.15 and 50,916.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78,106.78 : 107,804.15 = 50,916.84 : x
2. Step 2: Convert to fraction form
   78,106.78/107,804.15 = 50,916.84/x
3. Step 3: Cross multiply
   78,106.78x = 107,804.15 × 50,916.84
4. Step 4: Simplify right side
   78,106.78x = 5,489,046,656.89
5. Step 5: Solve for x
   x = 5,489,046,656.89/78,106.78
6. Step 6: Final answer
   x = 70,276.19