Finding the Fourth Proportional to 65,009.55, 91,210.20 and 65,009.55

Step by Step Solution

1. Step 1: Write the proportion equation
   65,009.55 : 91,210.20 = 65,009.55 : x
2. Step 2: Convert to fraction form
   65,009.55/91,210.20 = 65,009.55/x
3. Step 3: Cross multiply
   65,009.55x = 91,210.20 × 65,009.55
4. Step 4: Simplify right side
   65,009.55x = 5,929,534,057.41
5. Step 5: Solve for x
   x = 5,929,534,057.41/65,009.55
6. Step 6: Final answer
   x = 91,210.20