Finding the Fourth Proportional to 2,188.89, 3,279.69 and 954.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.89 : 3,279.69 = 954.45 : x
2. Step 2: Convert to fraction form
   2,188.89/3,279.69 = 954.45/x
3. Step 3: Cross multiply
   2,188.89x = 3,279.69 × 954.45
4. Step 4: Simplify right side
   2,188.89x = 3,130,300.12
5. Step 5: Solve for x
   x = 3,130,300.12/2,188.89
6. Step 6: Final answer
   x = 1,430.09