Finding the Fourth Proportional to 118,689.37, 163,791.59 and 64,977.73

Step by Step Solution

1. Step 1: Write the proportion equation
   118,689.37 : 163,791.59 = 64,977.73 : x
2. Step 2: Convert to fraction form
   118,689.37/163,791.59 = 64,977.73/x
3. Step 3: Cross multiply
   118,689.37x = 163,791.59 × 64,977.73
4. Step 4: Simplify right side
   118,689.37x = 10,642,804,976.92
5. Step 5: Solve for x
   x = 10,642,804,976.92/118,689.37
6. Step 6: Final answer
   x = 89,669.41