Finding the Fourth Proportional to 1,093.72, 1,507.24 and 782.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,093.72 : 1,507.24 = 782.68 : x
2. Step 2: Convert to fraction form
   1,093.72/1,507.24 = 782.68/x
3. Step 3: Cross multiply
   1,093.72x = 1,507.24 × 782.68
4. Step 4: Simplify right side
   1,093.72x = 1,179,686.60
5. Step 5: Solve for x
   x = 1,179,686.60/1,093.72
6. Step 6: Final answer
   x = 1,078.60