Finding the Third Proportional to 5,643,764 and 8,516,526

Step by Step Solution

1. Step 1: Write the proportion equation
   5,643,764 : 8,516,526 = 8,516,526 : x
2. Step 2: Convert to fraction form
   5,643,764/8,516,526 = 8,516,526/x
3. Step 3: Cross multiply
   5,643,764x = 8,516,526 × 8,516,526
4. Step 4: Simplify right side
   5,643,764x = 72,531,215,108,676
5. Step 5: Solve for x
   x = 72,531,215,108,676/5,643,764
6. Step 6: Final answer
   x = 12,851,567.70