Finding the Fourth Proportional to 118,944.31, 164,128.06 and 65,215.19

Step by Step Solution

1. Step 1: Write the proportion equation
   118,944.31 : 164,128.06 = 65,215.19 : x
2. Step 2: Convert to fraction form
   118,944.31/164,128.06 = 65,215.19/x
3. Step 3: Cross multiply
   118,944.31x = 164,128.06 × 65,215.19
4. Step 4: Simplify right side
   118,944.31x = 10,703,642,617.23
5. Step 5: Solve for x
   x = 10,703,642,617.23/118,944.31
6. Step 6: Final answer
   x = 89,988.69