Finding the Third Proportional to 56,338 and 86,931

Step by Step Solution

1. Step 1: Write the proportion equation
   56,338 : 86,931 = 86,931 : x
2. Step 2: Convert to fraction form
   56,338/86,931 = 86,931/x
3. Step 3: Cross multiply
   56,338x = 86,931 × 86,931
4. Step 4: Simplify right side
   56,338x = 7,556,998,761
5. Step 5: Solve for x
   x = 7,556,998,761/56,338
6. Step 6: Final answer
   x = 134,136.80