Finding the Third Proportional to 11,978,683 and 18,617,752.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,978,683 : 18,617,752.50 = 18,617,752.50 : x
2. Step 2: Convert to fraction form
   11,978,683/18,617,752.50 = 18,617,752.50/x
3. Step 3: Cross multiply
   11,978,683x = 18,617,752.50 × 18,617,752.50
4. Step 4: Simplify right side
   11,978,683x = 346,620,708,151,256.25
5. Step 5: Solve for x
   x = 346,620,708,151,256.25/11,978,683
6. Step 6: Final answer
   x = 28,936,462.23