Finding the Fourth Proportional to 1,280.72, 1,924.32 and 1,241.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,280.72 : 1,924.32 = 1,241.84 : x
2. Step 2: Convert to fraction form
   1,280.72/1,924.32 = 1,241.84/x
3. Step 3: Cross multiply
   1,280.72x = 1,924.32 × 1,241.84
4. Step 4: Simplify right side
   1,280.72x = 2,389,697.55
5. Step 5: Solve for x
   x = 2,389,697.55/1,280.72
6. Step 6: Final answer
   x = 1,865.90