Finding the Fourth Proportional to 1,139.42, 1,707.06 and 792.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.42 : 1,707.06 = 792.02 : x
2. Step 2: Convert to fraction form
   1,139.42/1,707.06 = 792.02/x
3. Step 3: Cross multiply
   1,139.42x = 1,707.06 × 792.02
4. Step 4: Simplify right side
   1,139.42x = 1,352,025.66
5. Step 5: Solve for x
   x = 1,352,025.66/1,139.42
6. Step 6: Final answer
   x = 1,186.59