Finding the Fourth Proportional to 78,567.93, 107,716.77 and 77,146.38

Step by Step Solution

1. Step 1: Write the proportion equation
   78,567.93 : 107,716.77 = 77,146.38 : x
2. Step 2: Convert to fraction form
   78,567.93/107,716.77 = 77,146.38/x
3. Step 3: Cross multiply
   78,567.93x = 107,716.77 × 77,146.38
4. Step 4: Simplify right side
   78,567.93x = 8,309,958,870.79
5. Step 5: Solve for x
   x = 8,309,958,870.79/78,567.93
6. Step 6: Final answer
   x = 105,767.82