Finding the Third Proportional to 917,901 and 1,290,321

Step by Step Solution

1. Step 1: Write the proportion equation
   917,901 : 1,290,321 = 1,290,321 : x
2. Step 2: Convert to fraction form
   917,901/1,290,321 = 1,290,321/x
3. Step 3: Cross multiply
   917,901x = 1,290,321 × 1,290,321
4. Step 4: Simplify right side
   917,901x = 1,664,928,283,041
5. Step 5: Solve for x
   x = 1,664,928,283,041/917,901
6. Step 6: Final answer
   x = 1,813,842.98