Finding the Third Proportional to 86,890.50 and 190,386

Step by Step Solution

1. Step 1: Write the proportion equation
   86,890.50 : 190,386 = 190,386 : x
2. Step 2: Convert to fraction form
   86,890.50/190,386 = 190,386/x
3. Step 3: Cross multiply
   86,890.50x = 190,386 × 190,386
4. Step 4: Simplify right side
   86,890.50x = 36,246,828,996
5. Step 5: Solve for x
   x = 36,246,828,996/86,890.50
6. Step 6: Final answer
   x = 417,155.26