Finding the Fourth Proportional to 118,907.60, 164,091.84 and 65,194.88

Step by Step Solution

1. Step 1: Write the proportion equation
   118,907.60 : 164,091.84 = 65,194.88 : x
2. Step 2: Convert to fraction form
   118,907.60/164,091.84 = 65,194.88/x
3. Step 3: Cross multiply
   118,907.60x = 164,091.84 × 65,194.88
4. Step 4: Simplify right side
   118,907.60x = 10,697,947,817.78
5. Step 5: Solve for x
   x = 10,697,947,817.78/118,907.60
6. Step 6: Final answer
   x = 89,968.58