Finding the Third Proportional to 86,190 and 182,815.50

Step by Step Solution

1. Step 1: Write the proportion equation
   86,190 : 182,815.50 = 182,815.50 : x
2. Step 2: Convert to fraction form
   86,190/182,815.50 = 182,815.50/x
3. Step 3: Cross multiply
   86,190x = 182,815.50 × 182,815.50
4. Step 4: Simplify right side
   86,190x = 33,421,507,040.25
5. Step 5: Solve for x
   x = 33,421,507,040.25/86,190
6. Step 6: Final answer
   x = 387,765.48