Finding the Fourth Proportional to 78,066.24, 107,629.74 and 49,761.60

Step by Step Solution

1. Step 1: Write the proportion equation
   78,066.24 : 107,629.74 = 49,761.60 : x
2. Step 2: Convert to fraction form
   78,066.24/107,629.74 = 49,761.60/x
3. Step 3: Cross multiply
   78,066.24x = 107,629.74 × 49,761.60
4. Step 4: Simplify right side
   78,066.24x = 5,355,828,069.98
5. Step 5: Solve for x
   x = 5,355,828,069.98/78,066.24
6. Step 6: Final answer
   x = 68,606.20