Finding the Third Proportional to 5,467,240 and 8,689,128

Step by Step Solution

1. Step 1: Write the proportion equation
   5,467,240 : 8,689,128 = 8,689,128 : x
2. Step 2: Convert to fraction form
   5,467,240/8,689,128 = 8,689,128/x
3. Step 3: Cross multiply
   5,467,240x = 8,689,128 × 8,689,128
4. Step 4: Simplify right side
   5,467,240x = 75,500,945,400,384
5. Step 5: Solve for x
   x = 75,500,945,400,384/5,467,240
6. Step 6: Final answer
   x = 13,809,700.21