Finding the Fourth Proportional to 158,131.12, 236,812.72 and 86,945.08

Step by Step Solution

1. Step 1: Write the proportion equation
   158,131.12 : 236,812.72 = 86,945.08 : x
2. Step 2: Convert to fraction form
   158,131.12/236,812.72 = 86,945.08/x
3. Step 3: Cross multiply
   158,131.12x = 236,812.72 × 86,945.08
4. Step 4: Simplify right side
   158,131.12x = 20,589,700,885.42
5. Step 5: Solve for x
   x = 20,589,700,885.42/158,131.12
6. Step 6: Final answer
   x = 130,206.51