Finding the Third Proportional to 140,590.69 and 297,940.78

Step by Step Solution

1. Step 1: Write the proportion equation
   140,590.69 : 297,940.78 = 297,940.78 : x
2. Step 2: Convert to fraction form
   140,590.69/297,940.78 = 297,940.78/x
3. Step 3: Cross multiply
   140,590.69x = 297,940.78 × 297,940.78
4. Step 4: Simplify right side
   140,590.69x = 88,768,709,131.86
5. Step 5: Solve for x
   x = 88,768,709,131.86/140,590.69
6. Step 6: Final answer
   x = 631,398.21