Finding the Fourth Proportional to 118,395.66, 163,386.18 and 64,681.59

Step by Step Solution

1. Step 1: Write the proportion equation
   118,395.66 : 163,386.18 = 64,681.59 : x
2. Step 2: Convert to fraction form
   118,395.66/163,386.18 = 64,681.59/x
3. Step 3: Cross multiply
   118,395.66x = 163,386.18 × 64,681.59
4. Step 4: Simplify right side
   118,395.66x = 10,568,077,906.43
5. Step 5: Solve for x
   x = 10,568,077,906.43/118,395.66
6. Step 6: Final answer
   x = 89,260.69