Finding the Fourth Proportional to 1,530.72, 2,112.16 and 940.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.72 : 2,112.16 = 940.96 : x
2. Step 2: Convert to fraction form
   1,530.72/2,112.16 = 940.96/x
3. Step 3: Cross multiply
   1,530.72x = 2,112.16 × 940.96
4. Step 4: Simplify right side
   1,530.72x = 1,987,458.07
5. Step 5: Solve for x
   x = 1,987,458.07/1,530.72
6. Step 6: Final answer
   x = 1,298.38