Finding the Third Proportional to 20,131.50 and 42,861.75

Step by Step Solution

1. Step 1: Write the proportion equation
   20,131.50 : 42,861.75 = 42,861.75 : x
2. Step 2: Convert to fraction form
   20,131.50/42,861.75 = 42,861.75/x
3. Step 3: Cross multiply
   20,131.50x = 42,861.75 × 42,861.75
4. Step 4: Simplify right side
   20,131.50x = 1,837,129,613.06
5. Step 5: Solve for x
   x = 1,837,129,613.06/20,131.50
6. Step 6: Final answer
   x = 91,256.47