Finding the Third Proportional to 12,658,689 and 19,613,515.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,658,689 : 19,613,515.50 = 19,613,515.50 : x
2. Step 2: Convert to fraction form
   12,658,689/19,613,515.50 = 19,613,515.50/x
3. Step 3: Cross multiply
   12,658,689x = 19,613,515.50 × 19,613,515.50
4. Step 4: Simplify right side
   12,658,689x = 384,689,990,268,740.25
5. Step 5: Solve for x
   x = 384,689,990,268,740.25/12,658,689
6. Step 6: Final answer
   x = 30,389,402.11