Finding the Fourth Proportional to 118,912.64, 164,095 and 65,196.40

Step by Step Solution

1. Step 1: Write the proportion equation
   118,912.64 : 164,095 = 65,196.40 : x
2. Step 2: Convert to fraction form
   118,912.64/164,095 = 65,196.40/x
3. Step 3: Cross multiply
   118,912.64x = 164,095 × 65,196.40
4. Step 4: Simplify right side
   118,912.64x = 10,698,403,258
5. Step 5: Solve for x
   x = 10,698,403,258/118,912.64
6. Step 6: Final answer
   x = 89,968.60