Finding the Fourth Proportional to 2,130.48, 2,953.68 and 2,019.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,130.48 : 2,953.68 = 2,019.72 : x
2. Step 2: Convert to fraction form
   2,130.48/2,953.68 = 2,019.72/x
3. Step 3: Cross multiply
   2,130.48x = 2,953.68 × 2,019.72
4. Step 4: Simplify right side
   2,130.48x = 5,965,606.57
5. Step 5: Solve for x
   x = 5,965,606.57/2,130.48
6. Step 6: Final answer
   x = 2,800.12