Finding the Fourth Proportional to 13,259.02, 19,880.84 and 9,103.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,259.02 : 19,880.84 = 9,103.72 : x
2. Step 2: Convert to fraction form
   13,259.02/19,880.84 = 9,103.72/x
3. Step 3: Cross multiply
   13,259.02x = 19,880.84 × 9,103.72
4. Step 4: Simplify right side
   13,259.02x = 180,989,600.72
5. Step 5: Solve for x
   x = 180,989,600.72/13,259.02
6. Step 6: Final answer
   x = 13,650.30