Finding the Fourth Proportional to 118,855.72, 164,021.52 and 65,141.20

Step by Step Solution

1. Step 1: Write the proportion equation
   118,855.72 : 164,021.52 = 65,141.20 : x
2. Step 2: Convert to fraction form
   118,855.72/164,021.52 = 65,141.20/x
3. Step 3: Cross multiply
   118,855.72x = 164,021.52 × 65,141.20
4. Step 4: Simplify right side
   118,855.72x = 10,684,558,638.62
5. Step 5: Solve for x
   x = 10,684,558,638.62/118,855.72
6. Step 6: Final answer
   x = 89,895.20