Finding the Third Proportional to 5,643,760 and 8,516,520

Step by Step Solution

1. Step 1: Write the proportion equation
   5,643,760 : 8,516,520 = 8,516,520 : x
2. Step 2: Convert to fraction form
   5,643,760/8,516,520 = 8,516,520/x
3. Step 3: Cross multiply
   5,643,760x = 8,516,520 × 8,516,520
4. Step 4: Simplify right side
   5,643,760x = 72,531,112,910,400
5. Step 5: Solve for x
   x = 72,531,112,910,400/5,643,760
6. Step 6: Final answer
   x = 12,851,558.70