Finding the Fourth Proportional to 12,603, 17,385.96 and 7,564.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,603 : 17,385.96 = 7,564.80 : x
2. Step 2: Convert to fraction form
   12,603/17,385.96 = 7,564.80/x
3. Step 3: Cross multiply
   12,603x = 17,385.96 × 7,564.80
4. Step 4: Simplify right side
   12,603x = 131,521,310.21
5. Step 5: Solve for x
   x = 131,521,310.21/12,603
6. Step 6: Final answer
   x = 10,435.71