Finding the Fourth Proportional to 65,007.80, 91,133.80 and 65,007.80

Step by Step Solution

1. Step 1: Write the proportion equation
   65,007.80 : 91,133.80 = 65,007.80 : x
2. Step 2: Convert to fraction form
   65,007.80/91,133.80 = 65,007.80/x
3. Step 3: Cross multiply
   65,007.80x = 91,133.80 × 65,007.80
4. Step 4: Simplify right side
   65,007.80x = 5,924,407,843.64
5. Step 5: Solve for x
   x = 5,924,407,843.64/65,007.80
6. Step 6: Final answer
   x = 91,133.80