Finding the Third Proportional to 53,388 and 86,000

Step by Step Solution

1. Step 1: Write the proportion equation
   53,388 : 86,000 = 86,000 : x
2. Step 2: Convert to fraction form
   53,388/86,000 = 86,000/x
3. Step 3: Cross multiply
   53,388x = 86,000 × 86,000
4. Step 4: Simplify right side
   53,388x = 7,396,000,000
5. Step 5: Solve for x
   x = 7,396,000,000/53,388
6. Step 6: Final answer
   x = 138,533.00