Finding the Third Proportional to 39,429.50 and 86,492.50

Step by Step Solution

1. Step 1: Write the proportion equation
   39,429.50 : 86,492.50 = 86,492.50 : x
2. Step 2: Convert to fraction form
   39,429.50/86,492.50 = 86,492.50/x
3. Step 3: Cross multiply
   39,429.50x = 86,492.50 × 86,492.50
4. Step 4: Simplify right side
   39,429.50x = 7,480,952,556.25
5. Step 5: Solve for x
   x = 7,480,952,556.25/39,429.50
6. Step 6: Final answer
   x = 189,729.84