Finding the Fourth Proportional to 131,667.20, 197,371.20 and 65,117.60

Step by Step Solution

1. Step 1: Write the proportion equation
   131,667.20 : 197,371.20 = 65,117.60 : x
2. Step 2: Convert to fraction form
   131,667.20/197,371.20 = 65,117.60/x
3. Step 3: Cross multiply
   131,667.20x = 197,371.20 × 65,117.60
4. Step 4: Simplify right side
   131,667.20x = 12,852,338,853.12
5. Step 5: Solve for x
   x = 12,852,338,853.12/131,667.20
6. Step 6: Final answer
   x = 97,612.30