Finding the Fourth Proportional to 118,836.09, 163,993.96 and 65,123.07

Step by Step Solution

1. Step 1: Write the proportion equation
   118,836.09 : 163,993.96 = 65,123.07 : x
2. Step 2: Convert to fraction form
   118,836.09/163,993.96 = 65,123.07/x
3. Step 3: Cross multiply
   118,836.09x = 163,993.96 × 65,123.07
4. Step 4: Simplify right side
   118,836.09x = 10,679,790,136.66
5. Step 5: Solve for x
   x = 10,679,790,136.66/118,836.09
6. Step 6: Final answer
   x = 89,869.92