Finding the Third Proportional to 458,932.50 and 645,136.31

Step by Step Solution

1. Step 1: Write the proportion equation
   458,932.50 : 645,136.31 = 645,136.31 : x
2. Step 2: Convert to fraction form
   458,932.50/645,136.31 = 645,136.31/x
3. Step 3: Cross multiply
   458,932.50x = 645,136.31 × 645,136.31
4. Step 4: Simplify right side
   458,932.50x = 416,200,861,706.10
5. Step 5: Solve for x
   x = 416,200,861,706.10/458,932.50
6. Step 6: Final answer
   x = 906,889.06