Finding the Fourth Proportional to 118,795.50, 163,938.09 and 65,081.57

Step by Step Solution

1. Step 1: Write the proportion equation
   118,795.50 : 163,938.09 = 65,081.57 : x
2. Step 2: Convert to fraction form
   118,795.50/163,938.09 = 65,081.57/x
3. Step 3: Cross multiply
   118,795.50x = 163,938.09 × 65,081.57
4. Step 4: Simplify right side
   118,795.50x = 10,669,347,460.31
5. Step 5: Solve for x
   x = 10,669,347,460.31/118,795.50
6. Step 6: Final answer
   x = 89,812.72