Finding the Fourth Proportional to 1,679.38, 2,527.91 and 1,428.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,679.38 : 2,527.91 = 1,428.82 : x
2. Step 2: Convert to fraction form
   1,679.38/2,527.91 = 1,428.82/x
3. Step 3: Cross multiply
   1,679.38x = 2,527.91 × 1,428.82
4. Step 4: Simplify right side
   1,679.38x = 3,611,928.37
5. Step 5: Solve for x
   x = 3,611,928.37/1,679.38
6. Step 6: Final answer
   x = 2,150.75