Finding the Third Proportional to 423,072 and 905,190.75

Step by Step Solution

1. Step 1: Write the proportion equation
   423,072 : 905,190.75 = 905,190.75 : x
2. Step 2: Convert to fraction form
   423,072/905,190.75 = 905,190.75/x
3. Step 3: Cross multiply
   423,072x = 905,190.75 × 905,190.75
4. Step 4: Simplify right side
   423,072x = 819,370,293,885.56
5. Step 5: Solve for x
   x = 819,370,293,885.56/423,072
6. Step 6: Final answer
   x = 1,936,715.96