Finding the Third Proportional to 5,210,210 and 7,869,760

Step by Step Solution

1. Step 1: Write the proportion equation
   5,210,210 : 7,869,760 = 7,869,760 : x
2. Step 2: Convert to fraction form
   5,210,210/7,869,760 = 7,869,760/x
3. Step 3: Cross multiply
   5,210,210x = 7,869,760 × 7,869,760
4. Step 4: Simplify right side
   5,210,210x = 61,933,122,457,600
5. Step 5: Solve for x
   x = 61,933,122,457,600/5,210,210
6. Step 6: Final answer
   x = 11,886,876.43