Finding the Fourth Proportional to 3,709.47, 5,123.01 and 2,519.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,709.47 : 5,123.01 = 2,519.76 : x
2. Step 2: Convert to fraction form
   3,709.47/5,123.01 = 2,519.76/x
3. Step 3: Cross multiply
   3,709.47x = 5,123.01 × 2,519.76
4. Step 4: Simplify right side
   3,709.47x = 12,908,744.89
5. Step 5: Solve for x
   x = 12,908,744.89/3,709.47
6. Step 6: Final answer
   x = 3,479.94