Finding the Third Proportional to 1,551,688 and 2,421,856

Step by Step Solution

1. Step 1: Write the proportion equation
   1,551,688 : 2,421,856 = 2,421,856 : x
2. Step 2: Convert to fraction form
   1,551,688/2,421,856 = 2,421,856/x
3. Step 3: Cross multiply
   1,551,688x = 2,421,856 × 2,421,856
4. Step 4: Simplify right side
   1,551,688x = 5,865,386,484,736
5. Step 5: Solve for x
   x = 5,865,386,484,736/1,551,688
6. Step 6: Final answer
   x = 3,780,003.77