Finding the Third Proportional to 30,697.31 and 66,117.94

Step by Step Solution

1. Step 1: Write the proportion equation
   30,697.31 : 66,117.94 = 66,117.94 : x
2. Step 2: Convert to fraction form
   30,697.31/66,117.94 = 66,117.94/x
3. Step 3: Cross multiply
   30,697.31x = 66,117.94 × 66,117.94
4. Step 4: Simplify right side
   30,697.31x = 4,371,581,659.25
5. Step 5: Solve for x
   x = 4,371,581,659.25/30,697.31
6. Step 6: Final answer
   x = 142,409.26