Finding the Third Proportional to 143,294.06 and 311,499.42

Step by Step Solution

1. Step 1: Write the proportion equation
   143,294.06 : 311,499.42 = 311,499.42 : x
2. Step 2: Convert to fraction form
   143,294.06/311,499.42 = 311,499.42/x
3. Step 3: Cross multiply
   143,294.06x = 311,499.42 × 311,499.42
4. Step 4: Simplify right side
   143,294.06x = 97,031,889,828.46
5. Step 5: Solve for x
   x = 97,031,889,828.46/143,294.06
6. Step 6: Final answer
   x = 677,152.20