Finding the Third Proportional to 31,032.28 and 66,438.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,032.28 : 66,438.56 = 66,438.56 : x
2. Step 2: Convert to fraction form
   31,032.28/66,438.56 = 66,438.56/x
3. Step 3: Cross multiply
   31,032.28x = 66,438.56 × 66,438.56
4. Step 4: Simplify right side
   31,032.28x = 4,414,082,587.07
5. Step 5: Solve for x
   x = 4,414,082,587.07/31,032.28
6. Step 6: Final answer
   x = 142,241.64