Finding the Fourth Proportional to 118,978.92, 164,195.50 and 65,266.20

Step by Step Solution

1. Step 1: Write the proportion equation
   118,978.92 : 164,195.50 = 65,266.20 : x
2. Step 2: Convert to fraction form
   118,978.92/164,195.50 = 65,266.20/x
3. Step 3: Cross multiply
   118,978.92x = 164,195.50 × 65,266.20
4. Step 4: Simplify right side
   118,978.92x = 10,716,416,342.10
5. Step 5: Solve for x
   x = 10,716,416,342.10/118,978.92
6. Step 6: Final answer
   x = 90,069.87