Finding the Fourth Proportional to 1,061.13, 1,591.71 and 281.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.13 : 1,591.71 = 281.07 : x
2. Step 2: Convert to fraction form
   1,061.13/1,591.71 = 281.07/x
3. Step 3: Cross multiply
   1,061.13x = 1,591.71 × 281.07
4. Step 4: Simplify right side
   1,061.13x = 447,381.93
5. Step 5: Solve for x
   x = 447,381.93/1,061.13
6. Step 6: Final answer
   x = 421.61