Finding the Third Proportional to 12,151,911 and 28,685,745

Step by Step Solution

1. Step 1: Write the proportion equation
   12,151,911 : 28,685,745 = 28,685,745 : x
2. Step 2: Convert to fraction form
   12,151,911/28,685,745 = 28,685,745/x
3. Step 3: Cross multiply
   12,151,911x = 28,685,745 × 28,685,745
4. Step 4: Simplify right side
   12,151,911x = 822,871,966,205,025
5. Step 5: Solve for x
   x = 822,871,966,205,025/12,151,911
6. Step 6: Final answer
   x = 67,715,437.20