Finding the Fourth Proportional to 1,261.10, 1,891.69 and 603.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,261.10 : 1,891.69 = 603.05 : x
2. Step 2: Convert to fraction form
   1,261.10/1,891.69 = 603.05/x
3. Step 3: Cross multiply
   1,261.10x = 1,891.69 × 603.05
4. Step 4: Simplify right side
   1,261.10x = 1,140,772.69
5. Step 5: Solve for x
   x = 1,140,772.69/1,261.10
6. Step 6: Final answer
   x = 904.58