Finding the Fourth Proportional to 1,069.72, 1,475.78 and 603.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,069.72 : 1,475.78 = 603.88 : x
2. Step 2: Convert to fraction form
   1,069.72/1,475.78 = 603.88/x
3. Step 3: Cross multiply
   1,069.72x = 1,475.78 × 603.88
4. Step 4: Simplify right side
   1,069.72x = 891,194.03
5. Step 5: Solve for x
   x = 891,194.03/1,069.72
6. Step 6: Final answer
   x = 833.11