Finding the Third Proportional to 2,487,386 and 5,355,309

Step by Step Solution

1. Step 1: Write the proportion equation
   2,487,386 : 5,355,309 = 5,355,309 : x
2. Step 2: Convert to fraction form
   2,487,386/5,355,309 = 5,355,309/x
3. Step 3: Cross multiply
   2,487,386x = 5,355,309 × 5,355,309
4. Step 4: Simplify right side
   2,487,386x = 28,679,334,485,481
5. Step 5: Solve for x
   x = 28,679,334,485,481/2,487,386
6. Step 6: Final answer
   x = 11,529,909.10