Finding the Fourth Proportional to 118,939.33, 164,138.53 and 65,221.14

Step by Step Solution

1. Step 1: Write the proportion equation
   118,939.33 : 164,138.53 = 65,221.14 : x
2. Step 2: Convert to fraction form
   118,939.33/164,138.53 = 65,221.14/x
3. Step 3: Cross multiply
   118,939.33x = 164,138.53 × 65,221.14
4. Step 4: Simplify right side
   118,939.33x = 10,705,301,881.47
5. Step 5: Solve for x
   x = 10,705,301,881.47/118,939.33
6. Step 6: Final answer
   x = 90,006.41