Finding the Third Proportional to 31,129.69 and 68,801.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,129.69 : 68,801.06 = 68,801.06 : x
2. Step 2: Convert to fraction form
   31,129.69/68,801.06 = 68,801.06/x
3. Step 3: Cross multiply
   31,129.69x = 68,801.06 × 68,801.06
4. Step 4: Simplify right side
   31,129.69x = 4,733,586,201.13
5. Step 5: Solve for x
   x = 4,733,586,201.13/31,129.69
6. Step 6: Final answer
   x = 152,060.19