Finding the Third Proportional to 13,686,100 and 21,189,254

Step by Step Solution

1. Step 1: Write the proportion equation
   13,686,100 : 21,189,254 = 21,189,254 : x
2. Step 2: Convert to fraction form
   13,686,100/21,189,254 = 21,189,254/x
3. Step 3: Cross multiply
   13,686,100x = 21,189,254 × 21,189,254
4. Step 4: Simplify right side
   13,686,100x = 448,984,485,076,516
5. Step 5: Solve for x
   x = 448,984,485,076,516/13,686,100
6. Step 6: Final answer
   x = 32,805,874.94