Finding the Fourth Proportional to 7,090.79, 10,642.33 and 7,074.39

Step by Step Solution

1. Step 1: Write the proportion equation
   7,090.79 : 10,642.33 = 7,074.39 : x
2. Step 2: Convert to fraction form
   7,090.79/10,642.33 = 7,074.39/x
3. Step 3: Cross multiply
   7,090.79x = 10,642.33 × 7,074.39
4. Step 4: Simplify right side
   7,090.79x = 75,287,992.93
5. Step 5: Solve for x
   x = 75,287,992.93/7,090.79
6. Step 6: Final answer
   x = 10,617.72