Finding the Third Proportional to 140,681.25 and 311,769

Step by Step Solution

1. Step 1: Write the proportion equation
   140,681.25 : 311,769 = 311,769 : x
2. Step 2: Convert to fraction form
   140,681.25/311,769 = 311,769/x
3. Step 3: Cross multiply
   140,681.25x = 311,769 × 311,769
4. Step 4: Simplify right side
   140,681.25x = 97,199,909,361
5. Step 5: Solve for x
   x = 97,199,909,361/140,681.25
6. Step 6: Final answer
   x = 690,922.99