Finding the Fourth Proportional to 77,728.86, 107,296.56 and 49,042.62

Step by Step Solution

1. Step 1: Write the proportion equation
   77,728.86 : 107,296.56 = 49,042.62 : x
2. Step 2: Convert to fraction form
   77,728.86/107,296.56 = 49,042.62/x
3. Step 3: Cross multiply
   77,728.86x = 107,296.56 × 49,042.62
4. Step 4: Simplify right side
   77,728.86x = 5,262,104,419.39
5. Step 5: Solve for x
   x = 5,262,104,419.39/77,728.86
6. Step 6: Final answer
   x = 67,698.21