Finding the Fourth Proportional to 118,647.69, 163,731.61 and 64,931.62

Step by Step Solution

1. Step 1: Write the proportion equation
   118,647.69 : 163,731.61 = 64,931.62 : x
2. Step 2: Convert to fraction form
   118,647.69/163,731.61 = 64,931.62/x
3. Step 3: Cross multiply
   118,647.69x = 163,731.61 × 64,931.62
4. Step 4: Simplify right side
   118,647.69x = 10,631,358,682.51
5. Step 5: Solve for x
   x = 10,631,358,682.51/118,647.69
6. Step 6: Final answer
   x = 89,604.43