Finding the Third Proportional to 4,978,503 and 7,688,877

Step by Step Solution

1. Step 1: Write the proportion equation
   4,978,503 : 7,688,877 = 7,688,877 : x
2. Step 2: Convert to fraction form
   4,978,503/7,688,877 = 7,688,877/x
3. Step 3: Cross multiply
   4,978,503x = 7,688,877 × 7,688,877
4. Step 4: Simplify right side
   4,978,503x = 59,118,829,521,129
5. Step 5: Solve for x
   x = 59,118,829,521,129/4,978,503
6. Step 6: Final answer
   x = 11,874,820.51