Finding the Fourth Proportional to 118,711.42, 163,815.52 and 64,986.14

Step by Step Solution

1. Step 1: Write the proportion equation
   118,711.42 : 163,815.52 = 64,986.14 : x
2. Step 2: Convert to fraction form
   118,711.42/163,815.52 = 64,986.14/x
3. Step 3: Cross multiply
   118,711.42x = 163,815.52 × 64,986.14
4. Step 4: Simplify right side
   118,711.42x = 10,645,738,316.89
5. Step 5: Solve for x
   x = 10,645,738,316.89/118,711.42
6. Step 6: Final answer
   x = 89,677.46