Finding the Fourth Proportional to 12,879,780.24, 17,774,496.72 and 7,078,456.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,879,780.24 : 17,774,496.72 = 7,078,456.56 : x
2. Step 2: Convert to fraction form
   12,879,780.24/17,774,496.72 = 7,078,456.56/x
3. Step 3: Cross multiply
   12,879,780.24x = 17,774,496.72 × 7,078,456.56
4. Step 4: Simplify right side
   12,879,780.24x = 125,816,002,908,382.47
5. Step 5: Solve for x
   x = 125,816,002,908,382.47/12,879,780.24
6. Step 6: Final answer
   x = 9,768,489.88