Finding the Fourth Proportional to 7,018.74, 9,684.54 and 5,690.12

Step by Step Solution

1. Step 1: Write the proportion equation
   7,018.74 : 9,684.54 = 5,690.12 : x
2. Step 2: Convert to fraction form
   7,018.74/9,684.54 = 5,690.12/x
3. Step 3: Cross multiply
   7,018.74x = 9,684.54 × 5,690.12
4. Step 4: Simplify right side
   7,018.74x = 55,106,146.32
5. Step 5: Solve for x
   x = 55,106,146.32/7,018.74
6. Step 6: Final answer
   x = 7,851.29