Finding the Fourth Proportional to 118,860.69, 164,020.31 and 65,141.89

Step by Step Solution

1. Step 1: Write the proportion equation
   118,860.69 : 164,020.31 = 65,141.89 : x
2. Step 2: Convert to fraction form
   118,860.69/164,020.31 = 65,141.89/x
3. Step 3: Cross multiply
   118,860.69x = 164,020.31 × 65,141.89
4. Step 4: Simplify right side
   118,860.69x = 10,684,592,991.79
5. Step 5: Solve for x
   x = 10,684,592,991.79/118,860.69
6. Step 6: Final answer
   x = 89,891.73