Finding the Third Proportional to 5,421,870 and 7,228,352

Step by Step Solution

1. Step 1: Write the proportion equation
   5,421,870 : 7,228,352 = 7,228,352 : x
2. Step 2: Convert to fraction form
   5,421,870/7,228,352 = 7,228,352/x
3. Step 3: Cross multiply
   5,421,870x = 7,228,352 × 7,228,352
4. Step 4: Simplify right side
   5,421,870x = 52,249,072,635,904
5. Step 5: Solve for x
   x = 52,249,072,635,904/5,421,870
6. Step 6: Final answer
   x = 9,636,725.45