Finding the Fourth Proportional to 5,131.60, 7,081.50 and 3,036.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,131.60 : 7,081.50 = 3,036.40 : x
2. Step 2: Convert to fraction form
   5,131.60/7,081.50 = 3,036.40/x
3. Step 3: Cross multiply
   5,131.60x = 7,081.50 × 3,036.40
4. Step 4: Simplify right side
   5,131.60x = 21,502,266.60
5. Step 5: Solve for x
   x = 21,502,266.60/5,131.60
6. Step 6: Final answer
   x = 4,190.17