Finding the Third Proportional to 12,872,469 and 19,428,409.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,872,469 : 19,428,409.50 = 19,428,409.50 : x
2. Step 2: Convert to fraction form
   12,872,469/19,428,409.50 = 19,428,409.50/x
3. Step 3: Cross multiply
   12,872,469x = 19,428,409.50 × 19,428,409.50
4. Step 4: Simplify right side
   12,872,469x = 377,463,095,699,690.25
5. Step 5: Solve for x
   x = 377,463,095,699,690.25/12,872,469
6. Step 6: Final answer
   x = 29,323,286.44