Finding the Fourth Proportional to 5,115.50, 7,041.98 and 3,786.70

Step by Step Solution

1. Step 1: Write the proportion equation
   5,115.50 : 7,041.98 = 3,786.70 : x
2. Step 2: Convert to fraction form
   5,115.50/7,041.98 = 3,786.70/x
3. Step 3: Cross multiply
   5,115.50x = 7,041.98 × 3,786.70
4. Step 4: Simplify right side
   5,115.50x = 26,665,865.67
5. Step 5: Solve for x
   x = 26,665,865.67/5,115.50
6. Step 6: Final answer
   x = 5,212.76