Finding the Fourth Proportional to 116,147.20, 160,278.60 and 65,845.12

Step by Step Solution

1. Step 1: Write the proportion equation
   116,147.20 : 160,278.60 = 65,845.12 : x
2. Step 2: Convert to fraction form
   116,147.20/160,278.60 = 65,845.12/x
3. Step 3: Cross multiply
   116,147.20x = 160,278.60 × 65,845.12
4. Step 4: Simplify right side
   116,147.20x = 10,553,563,650.43
5. Step 5: Solve for x
   x = 10,553,563,650.43/116,147.20
6. Step 6: Final answer
   x = 90,863.69