Finding the Fourth Proportional to 12,390.42, 17,094.59 and 7,081.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,390.42 : 17,094.59 = 7,081.45 : x
2. Step 2: Convert to fraction form
   12,390.42/17,094.59 = 7,081.45/x
3. Step 3: Cross multiply
   12,390.42x = 17,094.59 × 7,081.45
4. Step 4: Simplify right side
   12,390.42x = 121,054,448.95
5. Step 5: Solve for x
   x = 121,054,448.95/12,390.42
6. Step 6: Final answer
   x = 9,770.01