Finding the Fourth Proportional to 12,387.13, 17,094.27 and 7,085.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,387.13 : 17,094.27 = 7,085.05 : x
2. Step 2: Convert to fraction form
   12,387.13/17,094.27 = 7,085.05/x
3. Step 3: Cross multiply
   12,387.13x = 17,094.27 × 7,085.05
4. Step 4: Simplify right side
   12,387.13x = 121,113,757.66
5. Step 5: Solve for x
   x = 121,113,757.66/12,387.13
6. Step 6: Final answer
   x = 9,777.39