Finding the Fourth Proportional to 89,713.62, 122,908.20 and 86,350.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,713.62 : 122,908.20 = 86,350.50 : x
2. Step 2: Convert to fraction form
   89,713.62/122,908.20 = 86,350.50/x
3. Step 3: Cross multiply
   89,713.62x = 122,908.20 × 86,350.50
4. Step 4: Simplify right side
   89,713.62x = 10,613,184,524.10
5. Step 5: Solve for x
   x = 10,613,184,524.10/89,713.62
6. Step 6: Final answer
   x = 118,300.71