Finding the Fourth Proportional to 2,123.17, 3,184.67 and 661.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.17 : 3,184.67 = 661.93 : x
2. Step 2: Convert to fraction form
   2,123.17/3,184.67 = 661.93/x
3. Step 3: Cross multiply
   2,123.17x = 3,184.67 × 661.93
4. Step 4: Simplify right side
   2,123.17x = 2,108,022.31
5. Step 5: Solve for x
   x = 2,108,022.31/2,123.17
6. Step 6: Final answer
   x = 992.87