Finding the Fourth Proportional to 12,783.58, 17,641.33 and 7,477.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,783.58 : 17,641.33 = 7,477.36 : x
2. Step 2: Convert to fraction form
   12,783.58/17,641.33 = 7,477.36/x
3. Step 3: Cross multiply
   12,783.58x = 17,641.33 × 7,477.36
4. Step 4: Simplify right side
   12,783.58x = 131,910,512.49
5. Step 5: Solve for x
   x = 131,910,512.49/12,783.58
6. Step 6: Final answer
   x = 10,318.75