Finding the Fourth Proportional to 1,139.06, 1,709.27 and 619.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.06 : 1,709.27 = 619.04 : x
2. Step 2: Convert to fraction form
   1,139.06/1,709.27 = 619.04/x
3. Step 3: Cross multiply
   1,139.06x = 1,709.27 × 619.04
4. Step 4: Simplify right side
   1,139.06x = 1,058,094.86
5. Step 5: Solve for x
   x = 1,058,094.86/1,139.06
6. Step 6: Final answer
   x = 928.92