Finding the Fourth Proportional to 1,032.72, 1,424.16 and 784.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,032.72 : 1,424.16 = 784.08 : x
2. Step 2: Convert to fraction form
   1,032.72/1,424.16 = 784.08/x
3. Step 3: Cross multiply
   1,032.72x = 1,424.16 × 784.08
4. Step 4: Simplify right side
   1,032.72x = 1,116,655.37
5. Step 5: Solve for x
   x = 1,116,655.37/1,032.72
6. Step 6: Final answer
   x = 1,081.28