Finding the Third Proportional to 39,921.75 and 86,930.44

Step by Step Solution

1. Step 1: Write the proportion equation
   39,921.75 : 86,930.44 = 86,930.44 : x
2. Step 2: Convert to fraction form
   39,921.75/86,930.44 = 86,930.44/x
3. Step 3: Cross multiply
   39,921.75x = 86,930.44 × 86,930.44
4. Step 4: Simplify right side
   39,921.75x = 7,556,900,963.94
5. Step 5: Solve for x
   x = 7,556,900,963.94/39,921.75
6. Step 6: Final answer
   x = 189,292.83