Finding the Fourth Proportional to 65,408.36, 90,091.59 and 50,272.07

Step by Step Solution

1. Step 1: Write the proportion equation
   65,408.36 : 90,091.59 = 50,272.07 : x
2. Step 2: Convert to fraction form
   65,408.36/90,091.59 = 50,272.07/x
3. Step 3: Cross multiply
   65,408.36x = 90,091.59 × 50,272.07
4. Step 4: Simplify right side
   65,408.36x = 4,529,090,718.89
5. Step 5: Solve for x
   x = 4,529,090,718.89/65,408.36
6. Step 6: Final answer
   x = 69,243.30