Finding the Fourth Proportional to 158,426.64, 218,628.72 and 86,809.38

Step by Step Solution

1. Step 1: Write the proportion equation
   158,426.64 : 218,628.72 = 86,809.38 : x
2. Step 2: Convert to fraction form
   158,426.64/218,628.72 = 86,809.38/x
3. Step 3: Cross multiply
   158,426.64x = 218,628.72 × 86,809.38
4. Step 4: Simplify right side
   158,426.64x = 18,979,023,633.39
5. Step 5: Solve for x
   x = 18,979,023,633.39/158,426.64
6. Step 6: Final answer
   x = 119,796.92