Finding the Fourth Proportional to 12,679,978.72, 17,498,370.72 and 7,247,587.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,679,978.72 : 17,498,370.72 = 7,247,587.36 : x
2. Step 2: Convert to fraction form
   12,679,978.72/17,498,370.72 = 7,247,587.36/x
3. Step 3: Cross multiply
   12,679,978.72x = 17,498,370.72 × 7,247,587.36
4. Step 4: Simplify right side
   12,679,978.72x = 126,820,970,450,866.09
5. Step 5: Solve for x
   x = 126,820,970,450,866.09/12,679,978.72
6. Step 6: Final answer
   x = 10,001,670.61