Finding the Fourth Proportional to 117,659.13, 162,366.78 and 65,972.78

Step by Step Solution

1. Step 1: Write the proportion equation
   117,659.13 : 162,366.78 = 65,972.78 : x
2. Step 2: Convert to fraction form
   117,659.13/162,366.78 = 65,972.78/x
3. Step 3: Cross multiply
   117,659.13x = 162,366.78 × 65,972.78
4. Step 4: Simplify right side
   117,659.13x = 10,711,787,856.25
5. Step 5: Solve for x
   x = 10,711,787,856.25/117,659.13
6. Step 6: Final answer
   x = 91,040.86