Finding the Fourth Proportional to 12,947,019.39, 17,866,849.86 and 7,145,759.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,947,019.39 : 17,866,849.86 = 7,145,759.48 : x
2. Step 2: Convert to fraction form
   12,947,019.39/17,866,849.86 = 7,145,759.48/x
3. Step 3: Cross multiply
   12,947,019.39x = 17,866,849.86 × 7,145,759.48
4. Step 4: Simplify right side
   12,947,019.39x = 127,672,211,675,497.41
5. Step 5: Solve for x
   x = 127,672,211,675,497.41/12,947,019.39
6. Step 6: Final answer
   x = 9,861,127.71