Finding the Fourth Proportional to 10,617,305.50, 15,926,016.57 and 2,639,129.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,617,305.50 : 15,926,016.57 = 2,639,129.50 : x
2. Step 2: Convert to fraction form
   10,617,305.50/15,926,016.57 = 2,639,129.50/x
3. Step 3: Cross multiply
   10,617,305.50x = 15,926,016.57 × 2,639,129.50
4. Step 4: Simplify right side
   10,617,305.50x = 42,030,820,147,375.81
5. Step 5: Solve for x
   x = 42,030,820,147,375.81/10,617,305.50
6. Step 6: Final answer
   x = 3,958,708.75