Finding the Fourth Proportional to 78,142.86, 107,766.28 and 51,275.16

Step by Step Solution

1. Step 1: Write the proportion equation
   78,142.86 : 107,766.28 = 51,275.16 : x
2. Step 2: Convert to fraction form
   78,142.86/107,766.28 = 51,275.16/x
3. Step 3: Cross multiply
   78,142.86x = 107,766.28 × 51,275.16
4. Step 4: Simplify right side
   78,142.86x = 5,525,732,993.23
5. Step 5: Solve for x
   x = 5,525,732,993.23/78,142.86
6. Step 6: Final answer
   x = 70,713.22