Finding the Third Proportional to 3,498,784 and 5,221,172

Step by Step Solution

1. Step 1: Write the proportion equation
   3,498,784 : 5,221,172 = 5,221,172 : x
2. Step 2: Convert to fraction form
   3,498,784/5,221,172 = 5,221,172/x
3. Step 3: Cross multiply
   3,498,784x = 5,221,172 × 5,221,172
4. Step 4: Simplify right side
   3,498,784x = 27,260,637,053,584
5. Step 5: Solve for x
   x = 27,260,637,053,584/3,498,784
6. Step 6: Final answer
   x = 7,791,460.42