Finding the Third Proportional to 978,478 and 1,556,657

Step by Step Solution

1. Step 1: Write the proportion equation
   978,478 : 1,556,657 = 1,556,657 : x
2. Step 2: Convert to fraction form
   978,478/1,556,657 = 1,556,657/x
3. Step 3: Cross multiply
   978,478x = 1,556,657 × 1,556,657
4. Step 4: Simplify right side
   978,478x = 2,423,181,015,649
5. Step 5: Solve for x
   x = 2,423,181,015,649/978,478
6. Step 6: Final answer
   x = 2,476,479.81