Finding the Fourth Proportional to 118,923.86, 164,113.61 and 65,208.75

Step by Step Solution

1. Step 1: Write the proportion equation
   118,923.86 : 164,113.61 = 65,208.75 : x
2. Step 2: Convert to fraction form
   118,923.86/164,113.61 = 65,208.75/x
3. Step 3: Cross multiply
   118,923.86x = 164,113.61 × 65,208.75
4. Step 4: Simplify right side
   118,923.86x = 10,701,643,040.04
5. Step 5: Solve for x
   x = 10,701,643,040.04/118,923.86
6. Step 6: Final answer
   x = 89,987.35