Finding the Fourth Proportional to 118,456.71, 163,357.17 and 77,559.81

Step by Step Solution

1. Step 1: Write the proportion equation
   118,456.71 : 163,357.17 = 77,559.81 : x
2. Step 2: Convert to fraction form
   118,456.71/163,357.17 = 77,559.81/x
3. Step 3: Cross multiply
   118,456.71x = 163,357.17 × 77,559.81
4. Step 4: Simplify right side
   118,456.71x = 12,669,951,067.34
5. Step 5: Solve for x
   x = 12,669,951,067.34/118,456.71
6. Step 6: Final answer
   x = 106,958.49