Finding the Third Proportional to 39,981.09 and 86,158.69

Step by Step Solution

1. Step 1: Write the proportion equation
   39,981.09 : 86,158.69 = 86,158.69 : x
2. Step 2: Convert to fraction form
   39,981.09/86,158.69 = 86,158.69/x
3. Step 3: Cross multiply
   39,981.09x = 86,158.69 × 86,158.69
4. Step 4: Simplify right side
   39,981.09x = 7,423,319,431.72
5. Step 5: Solve for x
   x = 7,423,319,431.72/39,981.09
6. Step 6: Final answer
   x = 185,670.74