Finding the Third Proportional to 921,618 and 1,317,915

Step by Step Solution

1. Step 1: Write the proportion equation
   921,618 : 1,317,915 = 1,317,915 : x
2. Step 2: Convert to fraction form
   921,618/1,317,915 = 1,317,915/x
3. Step 3: Cross multiply
   921,618x = 1,317,915 × 1,317,915
4. Step 4: Simplify right side
   921,618x = 1,736,899,947,225
5. Step 5: Solve for x
   x = 1,736,899,947,225/921,618
6. Step 6: Final answer
   x = 1,884,620.25