Finding the Fourth Proportional to 12,078,399, 16,662,698.28 and 7,180,842.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,078,399 : 16,662,698.28 = 7,180,842.15 : x
2. Step 2: Convert to fraction form
   12,078,399/16,662,698.28 = 7,180,842.15/x
3. Step 3: Cross multiply
   12,078,399x = 16,662,698.28 × 7,180,842.15
4. Step 4: Simplify right side
   12,078,399x = 119,652,206,141,756.50
5. Step 5: Solve for x
   x = 119,652,206,141,756.50/12,078,399
6. Step 6: Final answer
   x = 9,906,296.86