Finding the Fourth Proportional to 118,862.69, 164,023.07 and 65,143.89

Step by Step Solution

1. Step 1: Write the proportion equation
   118,862.69 : 164,023.07 = 65,143.89 : x
2. Step 2: Convert to fraction form
   118,862.69/164,023.07 = 65,143.89/x
3. Step 3: Cross multiply
   118,862.69x = 164,023.07 × 65,143.89
4. Step 4: Simplify right side
   118,862.69x = 10,685,100,829.54
5. Step 5: Solve for x
   x = 10,685,100,829.54/118,862.69
6. Step 6: Final answer
   x = 89,894.49