Finding the Third Proportional to 5,402,145 and 8,240,417

Step by Step Solution

1. Step 1: Write the proportion equation
   5,402,145 : 8,240,417 = 8,240,417 : x
2. Step 2: Convert to fraction form
   5,402,145/8,240,417 = 8,240,417/x
3. Step 3: Cross multiply
   5,402,145x = 8,240,417 × 8,240,417
4. Step 4: Simplify right side
   5,402,145x = 67,904,472,333,889
5. Step 5: Solve for x
   x = 67,904,472,333,889/5,402,145
6. Step 6: Final answer
   x = 12,569,909.24