Finding the Third Proportional to 87,315.47 and 188,404.31

Step by Step Solution

1. Step 1: Write the proportion equation
   87,315.47 : 188,404.31 = 188,404.31 : x
2. Step 2: Convert to fraction form
   87,315.47/188,404.31 = 188,404.31/x
3. Step 3: Cross multiply
   87,315.47x = 188,404.31 × 188,404.31
4. Step 4: Simplify right side
   87,315.47x = 35,496,184,968.60
5. Step 5: Solve for x
   x = 35,496,184,968.60/87,315.47
6. Step 6: Final answer
   x = 406,528.02