Finding the Third Proportional to 421,810 and 907,632

Step by Step Solution

1. Step 1: Write the proportion equation
   421,810 : 907,632 = 907,632 : x
2. Step 2: Convert to fraction form
   421,810/907,632 = 907,632/x
3. Step 3: Cross multiply
   421,810x = 907,632 × 907,632
4. Step 4: Simplify right side
   421,810x = 823,795,847,424
5. Step 5: Solve for x
   x = 823,795,847,424/421,810
6. Step 6: Final answer
   x = 1,953,002.17