Finding the Third Proportional to 31,157.16 and 68,146.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,157.16 : 68,146.31 = 68,146.31 : x
2. Step 2: Convert to fraction form
   31,157.16/68,146.31 = 68,146.31/x
3. Step 3: Cross multiply
   31,157.16x = 68,146.31 × 68,146.31
4. Step 4: Simplify right side
   31,157.16x = 4,643,919,907.35
5. Step 5: Solve for x
   x = 4,643,919,907.35/31,157.16
6. Step 6: Final answer
   x = 149,048.26