Finding the Fourth Proportional to 78,517.07, 108,343.71 and 53,078.78

Step by Step Solution

1. Step 1: Write the proportion equation
   78,517.07 : 108,343.71 = 53,078.78 : x
2. Step 2: Convert to fraction form
   78,517.07/108,343.71 = 53,078.78/x
3. Step 3: Cross multiply
   78,517.07x = 108,343.71 × 53,078.78
4. Step 4: Simplify right side
   78,517.07x = 5,750,752,218.33
5. Step 5: Solve for x
   x = 5,750,752,218.33/78,517.07
6. Step 6: Final answer
   x = 73,242.07