Finding the Third Proportional to 722,128 and 1,009,531

Step by Step Solution

1. Step 1: Write the proportion equation
   722,128 : 1,009,531 = 1,009,531 : x
2. Step 2: Convert to fraction form
   722,128/1,009,531 = 1,009,531/x
3. Step 3: Cross multiply
   722,128x = 1,009,531 × 1,009,531
4. Step 4: Simplify right side
   722,128x = 1,019,152,839,961
5. Step 5: Solve for x
   x = 1,019,152,839,961/722,128
6. Step 6: Final answer
   x = 1,411,318.82