Finding the Fourth Proportional to 78,019.97, 107,617.88 and 51,164.15

Step by Step Solution

1. Step 1: Write the proportion equation
   78,019.97 : 107,617.88 = 51,164.15 : x
2. Step 2: Convert to fraction form
   78,019.97/107,617.88 = 51,164.15/x
3. Step 3: Cross multiply
   78,019.97x = 107,617.88 × 51,164.15
4. Step 4: Simplify right side
   78,019.97x = 5,506,176,561.09
5. Step 5: Solve for x
   x = 5,506,176,561.09/78,019.97
6. Step 6: Final answer
   x = 70,573.94