Finding the Fourth Proportional to 118,861.69, 164,021.69 and 65,142.89

Step by Step Solution

1. Step 1: Write the proportion equation
   118,861.69 : 164,021.69 = 65,142.89 : x
2. Step 2: Convert to fraction form
   118,861.69/164,021.69 = 65,142.89/x
3. Step 3: Cross multiply
   118,861.69x = 164,021.69 × 65,142.89
4. Step 4: Simplify right side
   118,861.69x = 10,684,846,909.28
5. Step 5: Solve for x
   x = 10,684,846,909.28/118,861.69
6. Step 6: Final answer
   x = 89,893.11