Finding the Fourth Proportional to 118,588.05, 163,646.33 and 64,874.12

Step by Step Solution

1. Step 1: Write the proportion equation
   118,588.05 : 163,646.33 = 64,874.12 : x
2. Step 2: Convert to fraction form
   118,588.05/163,646.33 = 64,874.12/x
3. Step 3: Cross multiply
   118,588.05x = 163,646.33 × 64,874.12
4. Step 4: Simplify right side
   118,588.05x = 10,616,410,507.38
5. Step 5: Solve for x
   x = 10,616,410,507.38/118,588.05
6. Step 6: Final answer
   x = 89,523.44