Finding the Fourth Proportional to 12,385.16, 17,091.51 and 7,080.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,385.16 : 17,091.51 = 7,080.09 : x
2. Step 2: Convert to fraction form
   12,385.16/17,091.51 = 7,080.09/x
3. Step 3: Cross multiply
   12,385.16x = 17,091.51 × 7,080.09
4. Step 4: Simplify right side
   12,385.16x = 121,009,429.04
5. Step 5: Solve for x
   x = 121,009,429.04/12,385.16
6. Step 6: Final answer
   x = 9,770.52