Finding the Fourth Proportional to 10,080.20, 13,898.58 and 8,404.04

Step by Step Solution

1. Step 1: Write the proportion equation
   10,080.20 : 13,898.58 = 8,404.04 : x
2. Step 2: Convert to fraction form
   10,080.20/13,898.58 = 8,404.04/x
3. Step 3: Cross multiply
   10,080.20x = 13,898.58 × 8,404.04
4. Step 4: Simplify right side
   10,080.20x = 116,804,222.26
5. Step 5: Solve for x
   x = 116,804,222.26/10,080.20
6. Step 6: Final answer
   x = 11,587.49