Finding the Third Proportional to 189,912.94 and 415,116.56

Step by Step Solution

1. Step 1: Write the proportion equation
   189,912.94 : 415,116.56 = 415,116.56 : x
2. Step 2: Convert to fraction form
   189,912.94/415,116.56 = 415,116.56/x
3. Step 3: Cross multiply
   189,912.94x = 415,116.56 × 415,116.56
4. Step 4: Simplify right side
   189,912.94x = 172,321,760,461.82
5. Step 5: Solve for x
   x = 172,321,760,461.82/189,912.94
6. Step 6: Final answer
   x = 907,372.41