Finding the Fourth Proportional to 118,636.76, 163,714.74 and 64,918.17

Step by Step Solution

1. Step 1: Write the proportion equation
   118,636.76 : 163,714.74 = 64,918.17 : x
2. Step 2: Convert to fraction form
   118,636.76/163,714.74 = 64,918.17/x
3. Step 3: Cross multiply
   118,636.76x = 163,714.74 × 64,918.17
4. Step 4: Simplify right side
   118,636.76x = 10,628,061,322.83
5. Step 5: Solve for x
   x = 10,628,061,322.83/118,636.76
6. Step 6: Final answer
   x = 89,584.90