Finding the Fourth Proportional to 118,730.72, 163,846.68 and 65,015.12

Step by Step Solution

1. Step 1: Write the proportion equation
   118,730.72 : 163,846.68 = 65,015.12 : x
2. Step 2: Convert to fraction form
   118,730.72/163,846.68 = 65,015.12/x
3. Step 3: Cross multiply
   118,730.72x = 163,846.68 × 65,015.12
4. Step 4: Simplify right side
   118,730.72x = 10,652,511,561.80
5. Step 5: Solve for x
   x = 10,652,511,561.80/118,730.72
6. Step 6: Final answer
   x = 89,719.93