Finding the Fourth Proportional to 2,131.76, 2,942.12 and 1,606.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,131.76 : 2,942.12 = 1,606.88 : x
2. Step 2: Convert to fraction form
   2,131.76/2,942.12 = 1,606.88/x
3. Step 3: Cross multiply
   2,131.76x = 2,942.12 × 1,606.88
4. Step 4: Simplify right side
   2,131.76x = 4,727,633.79
5. Step 5: Solve for x
   x = 4,727,633.79/2,131.76
6. Step 6: Final answer
   x = 2,217.71