Finding the Third Proportional to 39,412.75 and 86,490.25

Step by Step Solution

1. Step 1: Write the proportion equation
   39,412.75 : 86,490.25 = 86,490.25 : x
2. Step 2: Convert to fraction form
   39,412.75/86,490.25 = 86,490.25/x
3. Step 3: Cross multiply
   39,412.75x = 86,490.25 × 86,490.25
4. Step 4: Simplify right side
   39,412.75x = 7,480,563,345.06
5. Step 5: Solve for x
   x = 7,480,563,345.06/39,412.75
6. Step 6: Final answer
   x = 189,800.59