Finding the Fourth Proportional to 2,428.62, 3,643.29 and 889.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.62 : 3,643.29 = 889.50 : x
2. Step 2: Convert to fraction form
   2,428.62/3,643.29 = 889.50/x
3. Step 3: Cross multiply
   2,428.62x = 3,643.29 × 889.50
4. Step 4: Simplify right side
   2,428.62x = 3,240,706.46
5. Step 5: Solve for x
   x = 3,240,706.46/2,428.62
6. Step 6: Final answer
   x = 1,334.38