Finding the Fourth Proportional to 118,686.37, 163,787.18 and 64,971.42

Step by Step Solution

1. Step 1: Write the proportion equation
   118,686.37 : 163,787.18 = 64,971.42 : x
2. Step 2: Convert to fraction form
   118,686.37/163,787.18 = 64,971.42/x
3. Step 3: Cross multiply
   118,686.37x = 163,787.18 × 64,971.42
4. Step 4: Simplify right side
   118,686.37x = 10,641,485,337.54
5. Step 5: Solve for x
   x = 10,641,485,337.54/118,686.37
6. Step 6: Final answer
   x = 89,660.55