Finding the Third Proportional to 715,878 and 1,558,359

Step by Step Solution

1. Step 1: Write the proportion equation
   715,878 : 1,558,359 = 1,558,359 : x
2. Step 2: Convert to fraction form
   715,878/1,558,359 = 1,558,359/x
3. Step 3: Cross multiply
   715,878x = 1,558,359 × 1,558,359
4. Step 4: Simplify right side
   715,878x = 2,428,482,772,881
5. Step 5: Solve for x
   x = 2,428,482,772,881/715,878
6. Step 6: Final answer
   x = 3,392,313.74