Finding the Third Proportional to 91,312 and 188,768

Step by Step Solution

1. Step 1: Write the proportion equation
   91,312 : 188,768 = 188,768 : x
2. Step 2: Convert to fraction form
   91,312/188,768 = 188,768/x
3. Step 3: Cross multiply
   91,312x = 188,768 × 188,768
4. Step 4: Simplify right side
   91,312x = 35,633,357,824
5. Step 5: Solve for x
   x = 35,633,357,824/91,312
6. Step 6: Final answer
   x = 390,237.40