Finding the Fourth Proportional to 131,040.37, 196,662.61 and 91,339.03

Step by Step Solution

1. Step 1: Write the proportion equation
   131,040.37 : 196,662.61 = 91,339.03 : x
2. Step 2: Convert to fraction form
   131,040.37/196,662.61 = 91,339.03/x
3. Step 3: Cross multiply
   131,040.37x = 196,662.61 × 91,339.03
4. Step 4: Simplify right side
   131,040.37x = 17,962,970,823.01
5. Step 5: Solve for x
   x = 17,962,970,823.01/131,040.37
6. Step 6: Final answer
   x = 137,079.68