Finding the Fourth Proportional to 118,902.78, 164,085.78 and 65,186.64

Step by Step Solution

1. Step 1: Write the proportion equation
   118,902.78 : 164,085.78 = 65,186.64 : x
2. Step 2: Convert to fraction form
   118,902.78/164,085.78 = 65,186.64/x
3. Step 3: Cross multiply
   118,902.78x = 164,085.78 × 65,186.64
4. Step 4: Simplify right side
   118,902.78x = 10,696,200,669.98
5. Step 5: Solve for x
   x = 10,696,200,669.98/118,902.78
6. Step 6: Final answer
   x = 89,957.53