Finding the Fourth Proportional to 118,859.69, 164,018.93 and 65,140.89

Step by Step Solution

1. Step 1: Write the proportion equation
   118,859.69 : 164,018.93 = 65,140.89 : x
2. Step 2: Convert to fraction form
   118,859.69/164,018.93 = 65,140.89/x
3. Step 3: Cross multiply
   118,859.69x = 164,018.93 × 65,140.89
4. Step 4: Simplify right side
   118,859.69x = 10,684,339,077.05
5. Step 5: Solve for x
   x = 10,684,339,077.05/118,859.69
6. Step 6: Final answer
   x = 89,890.35