Finding the Third Proportional to 13,509,990 and 19,907,653.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,509,990 : 19,907,653.50 = 19,907,653.50 : x
2. Step 2: Convert to fraction form
   13,509,990/19,907,653.50 = 19,907,653.50/x
3. Step 3: Cross multiply
   13,509,990x = 19,907,653.50 × 19,907,653.50
4. Step 4: Simplify right side
   13,509,990x = 396,314,667,876,062.25
5. Step 5: Solve for x
   x = 396,314,667,876,062.25/13,509,990
6. Step 6: Final answer
   x = 29,334,934.21