Finding the Fourth Proportional to 118,945.31, 164,129.45 and 65,216.19

Step by Step Solution

1. Step 1: Write the proportion equation
   118,945.31 : 164,129.45 = 65,216.19 : x
2. Step 2: Convert to fraction form
   118,945.31/164,129.45 = 65,216.19/x
3. Step 3: Cross multiply
   118,945.31x = 164,129.45 × 65,216.19
4. Step 4: Simplify right side
   118,945.31x = 10,703,897,069.71
5. Step 5: Solve for x
   x = 10,703,897,069.71/118,945.31
6. Step 6: Final answer
   x = 89,990.07