Finding the Fourth Proportional to 2,139.84, 2,953.92 and 1,518.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.84 : 2,953.92 = 1,518.72 : x
2. Step 2: Convert to fraction form
   2,139.84/2,953.92 = 1,518.72/x
3. Step 3: Cross multiply
   2,139.84x = 2,953.92 × 1,518.72
4. Step 4: Simplify right side
   2,139.84x = 4,486,177.38
5. Step 5: Solve for x
   x = 4,486,177.38/2,139.84
6. Step 6: Final answer
   x = 2,096.50