Finding the Third Proportional to 11,811,987 and 18,505,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,811,987 : 18,505,300.50 = 18,505,300.50 : x
2. Step 2: Convert to fraction form
   11,811,987/18,505,300.50 = 18,505,300.50/x
3. Step 3: Cross multiply
   11,811,987x = 18,505,300.50 × 18,505,300.50
4. Step 4: Simplify right side
   11,811,987x = 342,446,146,595,300.25
5. Step 5: Solve for x
   x = 342,446,146,595,300.25/11,811,987
6. Step 6: Final answer
   x = 28,991,409.03