Finding the Third Proportional to 5,402,135 and 8,240,405

Step by Step Solution

1. Step 1: Write the proportion equation
   5,402,135 : 8,240,405 = 8,240,405 : x
2. Step 2: Convert to fraction form
   5,402,135/8,240,405 = 8,240,405/x
3. Step 3: Cross multiply
   5,402,135x = 8,240,405 × 8,240,405
4. Step 4: Simplify right side
   5,402,135x = 67,904,274,564,025
5. Step 5: Solve for x
   x = 67,904,274,564,025/5,402,135
6. Step 6: Final answer
   x = 12,569,895.90