Finding the Third Proportional to 12,358.31 and 29,138.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,358.31 : 29,138.06 = 29,138.06 : x
2. Step 2: Convert to fraction form
   12,358.31/29,138.06 = 29,138.06/x
3. Step 3: Cross multiply
   12,358.31x = 29,138.06 × 29,138.06
4. Step 4: Simplify right side
   12,358.31x = 849,026,686.25
5. Step 5: Solve for x
   x = 849,026,686.25/12,358.31
6. Step 6: Final answer
   x = 68,700.86