Finding the Fourth Proportional to 2,150.64, 2,970.60 and 1,591.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,150.64 : 2,970.60 = 1,591.92 : x
2. Step 2: Convert to fraction form
   2,150.64/2,970.60 = 1,591.92/x
3. Step 3: Cross multiply
   2,150.64x = 2,970.60 × 1,591.92
4. Step 4: Simplify right side
   2,150.64x = 4,728,957.55
5. Step 5: Solve for x
   x = 4,728,957.55/2,150.64
6. Step 6: Final answer
   x = 2,198.86