Finding the Fourth Proportional to 65,186.70, 91,392.60 and 65,186.70

Step by Step Solution

1. Step 1: Write the proportion equation
   65,186.70 : 91,392.60 = 65,186.70 : x
2. Step 2: Convert to fraction form
   65,186.70/91,392.60 = 65,186.70/x
3. Step 3: Cross multiply
   65,186.70x = 91,392.60 × 65,186.70
4. Step 4: Simplify right side
   65,186.70x = 5,957,581,998.42
5. Step 5: Solve for x
   x = 5,957,581,998.42/65,186.70
6. Step 6: Final answer
   x = 91,392.60