Finding the Fourth Proportional to 1,281.72, 1,922.52 and 460.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,281.72 : 1,922.52 = 460.05 : x
2. Step 2: Convert to fraction form
   1,281.72/1,922.52 = 460.05/x
3. Step 3: Cross multiply
   1,281.72x = 1,922.52 × 460.05
4. Step 4: Simplify right side
   1,281.72x = 884,455.33
5. Step 5: Solve for x
   x = 884,455.33/1,281.72
6. Step 6: Final answer
   x = 690.05