Finding the Fourth Proportional to 7,072.42, 9,761.69 and 4,090.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,072.42 : 9,761.69 = 4,090.12 : x
2. Step 2: Convert to fraction form
   7,072.42/9,761.69 = 4,090.12/x
3. Step 3: Cross multiply
   7,072.42x = 9,761.69 × 4,090.12
4. Step 4: Simplify right side
   7,072.42x = 39,926,483.50
5. Step 5: Solve for x
   x = 39,926,483.50/7,072.42
6. Step 6: Final answer
   x = 5,645.38