Finding the Third Proportional to 31,239 and 68,303.25

Step by Step Solution

1. Step 1: Write the proportion equation
   31,239 : 68,303.25 = 68,303.25 : x
2. Step 2: Convert to fraction form
   31,239/68,303.25 = 68,303.25/x
3. Step 3: Cross multiply
   31,239x = 68,303.25 × 68,303.25
4. Step 4: Simplify right side
   31,239x = 4,665,333,960.56
5. Step 5: Solve for x
   x = 4,665,333,960.56/31,239
6. Step 6: Final answer
   x = 149,343.26