Finding the Third Proportional to 12,686.31 and 29,908.93

Step by Step Solution

1. Step 1: Write the proportion equation
   12,686.31 : 29,908.93 = 29,908.93 : x
2. Step 2: Convert to fraction form
   12,686.31/29,908.93 = 29,908.93/x
3. Step 3: Cross multiply
   12,686.31x = 29,908.93 × 29,908.93
4. Step 4: Simplify right side
   12,686.31x = 894,544,308.72
5. Step 5: Solve for x
   x = 894,544,308.72/12,686.31
6. Step 6: Final answer
   x = 70,512.58