Finding the Fourth Proportional to 2,123.99, 2,931.22 and 1,327.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.99 : 2,931.22 = 1,327.80 : x
2. Step 2: Convert to fraction form
   2,123.99/2,931.22 = 1,327.80/x
3. Step 3: Cross multiply
   2,123.99x = 2,931.22 × 1,327.80
4. Step 4: Simplify right side
   2,123.99x = 3,892,086.57
5. Step 5: Solve for x
   x = 3,892,086.57/2,123.99
6. Step 6: Final answer
   x = 1,832.44