Finding the Fourth Proportional to 2,188.50, 3,280.89 and 954.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.50 : 3,280.89 = 954.99 : x
2. Step 2: Convert to fraction form
   2,188.50/3,280.89 = 954.99/x
3. Step 3: Cross multiply
   2,188.50x = 3,280.89 × 954.99
4. Step 4: Simplify right side
   2,188.50x = 3,133,215.35
5. Step 5: Solve for x
   x = 3,133,215.35/2,188.50
6. Step 6: Final answer
   x = 1,431.67