Finding the Fourth Proportional to 11,443.36, 15,783.24 and 7,670.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,443.36 : 15,783.24 = 7,670.78 : x
2. Step 2: Convert to fraction form
   11,443.36/15,783.24 = 7,670.78/x
3. Step 3: Cross multiply
   11,443.36x = 15,783.24 × 7,670.78
4. Step 4: Simplify right side
   11,443.36x = 121,069,761.73
5. Step 5: Solve for x
   x = 121,069,761.73/11,443.36
6. Step 6: Final answer
   x = 10,579.91