Finding the Fourth Proportional to 2,123.04, 3,184.50 and 661.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.04 : 3,184.50 = 661.80 : x
2. Step 2: Convert to fraction form
   2,123.04/3,184.50 = 661.80/x
3. Step 3: Cross multiply
   2,123.04x = 3,184.50 × 661.80
4. Step 4: Simplify right side
   2,123.04x = 2,107,502.10
5. Step 5: Solve for x
   x = 2,107,502.10/2,123.04
6. Step 6: Final answer
   x = 992.68