Finding the Third Proportional to 1,215,972 and 1,817,154

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,972 : 1,817,154 = 1,817,154 : x
2. Step 2: Convert to fraction form
   1,215,972/1,817,154 = 1,817,154/x
3. Step 3: Cross multiply
   1,215,972x = 1,817,154 × 1,817,154
4. Step 4: Simplify right side
   1,215,972x = 3,302,048,659,716
5. Step 5: Solve for x
   x = 3,302,048,659,716/1,215,972
6. Step 6: Final answer
   x = 2,715,563.07