Finding the Fourth Proportional to 7,140.56, 10,713.37 and 3,191.45

Step by Step Solution

1. Step 1: Write the proportion equation
   7,140.56 : 10,713.37 = 3,191.45 : x
2. Step 2: Convert to fraction form
   7,140.56/10,713.37 = 3,191.45/x
3. Step 3: Cross multiply
   7,140.56x = 10,713.37 × 3,191.45
4. Step 4: Simplify right side
   7,140.56x = 34,191,168.73
5. Step 5: Solve for x
   x = 34,191,168.73/7,140.56
6. Step 6: Final answer
   x = 4,788.31