Finding the Fourth Proportional to 1,530.24, 2,111.52 and 940.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.24 : 2,111.52 = 940.80 : x
2. Step 2: Convert to fraction form
   1,530.24/2,111.52 = 940.80/x
3. Step 3: Cross multiply
   1,530.24x = 2,111.52 × 940.80
4. Step 4: Simplify right side
   1,530.24x = 1,986,518.02
5. Step 5: Solve for x
   x = 1,986,518.02/1,530.24
6. Step 6: Final answer
   x = 1,298.17