Finding the Third Proportional to 31,437 and 63,786

Step by Step Solution

1. Step 1: Write the proportion equation
   31,437 : 63,786 = 63,786 : x
2. Step 2: Convert to fraction form
   31,437/63,786 = 63,786/x
3. Step 3: Cross multiply
   31,437x = 63,786 × 63,786
4. Step 4: Simplify right side
   31,437x = 4,068,653,796
5. Step 5: Solve for x
   x = 4,068,653,796/31,437
6. Step 6: Final answer
   x = 129,422.46