Finding the Third Proportional to 211,288.50 and 458,404.31

Step by Step Solution

1. Step 1: Write the proportion equation
   211,288.50 : 458,404.31 = 458,404.31 : x
2. Step 2: Convert to fraction form
   211,288.50/458,404.31 = 458,404.31/x
3. Step 3: Cross multiply
   211,288.50x = 458,404.31 × 458,404.31
4. Step 4: Simplify right side
   211,288.50x = 210,134,513,718.60
5. Step 5: Solve for x
   x = 210,134,513,718.60/211,288.50
6. Step 6: Final answer
   x = 994,538.34