Finding the Third Proportional to 2,478,240 and 5,423,040

Step by Step Solution

1. Step 1: Write the proportion equation
   2,478,240 : 5,423,040 = 5,423,040 : x
2. Step 2: Convert to fraction form
   2,478,240/5,423,040 = 5,423,040/x
3. Step 3: Cross multiply
   2,478,240x = 5,423,040 × 5,423,040
4. Step 4: Simplify right side
   2,478,240x = 29,409,362,841,600
5. Step 5: Solve for x
   x = 29,409,362,841,600/2,478,240
6. Step 6: Final answer
   x = 11,867,035.82