Finding the Fourth Proportional to 5,189.67, 7,110.59 and 5,120.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,189.67 : 7,110.59 = 5,120.42 : x
2. Step 2: Convert to fraction form
   5,189.67/7,110.59 = 5,120.42/x
3. Step 3: Cross multiply
   5,189.67x = 7,110.59 × 5,120.42
4. Step 4: Simplify right side
   5,189.67x = 36,409,146.09
5. Step 5: Solve for x
   x = 36,409,146.09/5,189.67
6. Step 6: Final answer
   x = 7,015.70