Finding the Third Proportional to 86,691.50 and 186,316

Step by Step Solution

1. Step 1: Write the proportion equation
   86,691.50 : 186,316 = 186,316 : x
2. Step 2: Convert to fraction form
   86,691.50/186,316 = 186,316/x
3. Step 3: Cross multiply
   86,691.50x = 186,316 × 186,316
4. Step 4: Simplify right side
   86,691.50x = 34,713,651,856
5. Step 5: Solve for x
   x = 34,713,651,856/86,691.50
6. Step 6: Final answer
   x = 400,427.40