Finding the Third Proportional to 56,328 and 86,613

Step by Step Solution

1. Step 1: Write the proportion equation
   56,328 : 86,613 = 86,613 : x
2. Step 2: Convert to fraction form
   56,328/86,613 = 86,613/x
3. Step 3: Cross multiply
   56,328x = 86,613 × 86,613
4. Step 4: Simplify right side
   56,328x = 7,501,811,769
5. Step 5: Solve for x
   x = 7,501,811,769/56,328
6. Step 6: Final answer
   x = 133,180.87