Finding the Third Proportional to 5,521,500 and 8,528,490

Step by Step Solution

1. Step 1: Write the proportion equation
   5,521,500 : 8,528,490 = 8,528,490 : x
2. Step 2: Convert to fraction form
   5,521,500/8,528,490 = 8,528,490/x
3. Step 3: Cross multiply
   5,521,500x = 8,528,490 × 8,528,490
4. Step 4: Simplify right side
   5,521,500x = 72,735,141,680,100
5. Step 5: Solve for x
   x = 72,735,141,680,100/5,521,500
6. Step 6: Final answer
   x = 13,173,076.46