Finding the Third Proportional to 4,978,505 and 7,688,880

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978,505 : 7,688,880 = 7,688,880 : x
2. Step 2: Convert to fraction form
   4,978,505/7,688,880 = 7,688,880/x
3. Step 3: Cross multiply
   4,978,505x = 7,688,880 × 7,688,880
4. Step 4: Simplify right side
   4,978,505x = 59,118,875,654,400
5. Step 5: Solve for x
   x = 59,118,875,654,400/4,978,505
6. Step 6: Final answer
   x = 11,874,825.00