Finding the Fourth Proportional to 65,998.72, 91,078.32 and 36,190.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,998.72 : 91,078.32 = 36,190.72 : x
2. Step 2: Convert to fraction form
   65,998.72/91,078.32 = 36,190.72/x
3. Step 3: Cross multiply
   65,998.72x = 91,078.32 × 36,190.72
4. Step 4: Simplify right side
   65,998.72x = 3,296,189,977.19
5. Step 5: Solve for x
   x = 3,296,189,977.19/65,998.72
6. Step 6: Final answer
   x = 49,943.24