Finding the Third Proportional to 31,088.34 and 66,608.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,088.34 : 66,608.81 = 66,608.81 : x
2. Step 2: Convert to fraction form
   31,088.34/66,608.81 = 66,608.81/x
3. Step 3: Cross multiply
   31,088.34x = 66,608.81 × 66,608.81
4. Step 4: Simplify right side
   31,088.34x = 4,436,733,902.66
5. Step 5: Solve for x
   x = 4,436,733,902.66/31,088.34
6. Step 6: Final answer
   x = 142,713.74