Finding the Fourth Proportional to 76,742.79, 105,868.26 and 49,893.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,742.79 : 105,868.26 = 49,893.72 : x
2. Step 2: Convert to fraction form
   76,742.79/105,868.26 = 49,893.72/x
3. Step 3: Cross multiply
   76,742.79x = 105,868.26 × 49,893.72
4. Step 4: Simplify right side
   76,742.79x = 5,282,161,321.33
5. Step 5: Solve for x
   x = 5,282,161,321.33/76,742.79
6. Step 6: Final answer
   x = 68,829.41