Finding the Third Proportional to 39,429.07 and 86,491.76

Step by Step Solution

1. Step 1: Write the proportion equation
   39,429.07 : 86,491.76 = 86,491.76 : x
2. Step 2: Convert to fraction form
   39,429.07/86,491.76 = 86,491.76/x
3. Step 3: Cross multiply
   39,429.07x = 86,491.76 × 86,491.76
4. Step 4: Simplify right side
   39,429.07x = 7,480,824,169.50
5. Step 5: Solve for x
   x = 7,480,824,169.50/39,429.07
6. Step 6: Final answer
   x = 189,728.65