Finding the Fourth Proportional to 2,120.58, 2,923.29 and 1,530.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,120.58 : 2,923.29 = 1,530.09 : x
2. Step 2: Convert to fraction form
   2,120.58/2,923.29 = 1,530.09/x
3. Step 3: Cross multiply
   2,120.58x = 2,923.29 × 1,530.09
4. Step 4: Simplify right side
   2,120.58x = 4,472,896.80
5. Step 5: Solve for x
   x = 4,472,896.80/2,120.58
6. Step 6: Final answer
   x = 2,109.28