Finding the Fourth Proportional to 90,221.48, 135,345.89 and 65,448.46

Step by Step Solution

1. Step 1: Write the proportion equation
   90,221.48 : 135,345.89 = 65,448.46 : x
2. Step 2: Convert to fraction form
   90,221.48/135,345.89 = 65,448.46/x
3. Step 3: Cross multiply
   90,221.48x = 135,345.89 × 65,448.46
4. Step 4: Simplify right side
   90,221.48x = 8,858,180,067.83
5. Step 5: Solve for x
   x = 8,858,180,067.83/90,221.48
6. Step 6: Final answer
   x = 98,182.61