Finding the Third Proportional to 11,817,555 and 25,705,651.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,817,555 : 25,705,651.50 = 25,705,651.50 : x
2. Step 2: Convert to fraction form
   11,817,555/25,705,651.50 = 25,705,651.50/x
3. Step 3: Cross multiply
   11,817,555x = 25,705,651.50 × 25,705,651.50
4. Step 4: Simplify right side
   11,817,555x = 660,780,519,039,452.25
5. Step 5: Solve for x
   x = 660,780,519,039,452.25/11,817,555
6. Step 6: Final answer
   x = 55,915,163.42