Finding the Third Proportional to 4,417,776 and 9,662,688

Step by Step Solution

1. Step 1: Write the proportion equation
   4,417,776 : 9,662,688 = 9,662,688 : x
2. Step 2: Convert to fraction form
   4,417,776/9,662,688 = 9,662,688/x
3. Step 3: Cross multiply
   4,417,776x = 9,662,688 × 9,662,688
4. Step 4: Simplify right side
   4,417,776x = 93,367,539,385,344
5. Step 5: Solve for x
   x = 93,367,539,385,344/4,417,776
6. Step 6: Final answer
   x = 21,134,511.89