Finding the Third Proportional to 645,151.50 and 994,801.50

Step by Step Solution

1. Step 1: Write the proportion equation
   645,151.50 : 994,801.50 = 994,801.50 : x
2. Step 2: Convert to fraction form
   645,151.50/994,801.50 = 994,801.50/x
3. Step 3: Cross multiply
   645,151.50x = 994,801.50 × 994,801.50
4. Step 4: Simplify right side
   645,151.50x = 989,630,024,402.25
5. Step 5: Solve for x
   x = 989,630,024,402.25/645,151.50
6. Step 6: Final answer
   x = 1,533,949.82