Finding the Fourth Proportional to 118,680.69, 163,780.29 and 64,966.17

Step by Step Solution

1. Step 1: Write the proportion equation
   118,680.69 : 163,780.29 = 64,966.17 : x
2. Step 2: Convert to fraction form
   118,680.69/163,780.29 = 64,966.17/x
3. Step 3: Cross multiply
   118,680.69x = 163,780.29 × 64,966.17
4. Step 4: Simplify right side
   118,680.69x = 10,640,178,162.79
5. Step 5: Solve for x
   x = 10,640,178,162.79/118,680.69
6. Step 6: Final answer
   x = 89,653.83