Finding the Fourth Proportional to 105,077.39, 157,723.30 and 76,913.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,077.39 : 157,723.30 = 76,913.78 : x
2. Step 2: Convert to fraction form
   105,077.39/157,723.30 = 76,913.78/x
3. Step 3: Cross multiply
   105,077.39x = 157,723.30 × 76,913.78
4. Step 4: Simplify right side
   105,077.39x = 12,131,095,399.10
5. Step 5: Solve for x
   x = 12,131,095,399.10/105,077.39
6. Step 6: Final answer
   x = 115,449.16