Finding the Fourth Proportional to 2,150.64, 2,969.15 and 1,679.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.64 : 2,969.15 = 1,679.63 : x
2. Step 2: Convert to fraction form
   2,150.64/2,969.15 = 1,679.63/x
3. Step 3: Cross multiply
   2,150.64x = 2,969.15 × 1,679.63
4. Step 4: Simplify right side
   2,150.64x = 4,987,050.17
5. Step 5: Solve for x
   x = 4,987,050.17/2,150.64
6. Step 6: Final answer
   x = 2,318.87