Finding the Third Proportional to 443,152.50 and 645,352.50

Step by Step Solution

1. Step 1: Write the proportion equation
   443,152.50 : 645,352.50 = 645,352.50 : x
2. Step 2: Convert to fraction form
   443,152.50/645,352.50 = 645,352.50/x
3. Step 3: Cross multiply
   443,152.50x = 645,352.50 × 645,352.50
4. Step 4: Simplify right side
   443,152.50x = 416,479,849,256.25
5. Step 5: Solve for x
   x = 416,479,849,256.25/443,152.50
6. Step 6: Final answer
   x = 939,811.58