Finding the Third Proportional to 302,830.50 and 637,012.50

Step by Step Solution

1. Step 1: Write the proportion equation
   302,830.50 : 637,012.50 = 637,012.50 : x
2. Step 2: Convert to fraction form
   302,830.50/637,012.50 = 637,012.50/x
3. Step 3: Cross multiply
   302,830.50x = 637,012.50 × 637,012.50
4. Step 4: Simplify right side
   302,830.50x = 405,784,925,156.25
5. Step 5: Solve for x
   x = 405,784,925,156.25/302,830.50
6. Step 6: Final answer
   x = 1,339,973.76