Finding the Fourth Proportional to 2,123.71, 3,185.85 and 663.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.71 : 3,185.85 = 663.01 : x
2. Step 2: Convert to fraction form
   2,123.71/3,185.85 = 663.01/x
3. Step 3: Cross multiply
   2,123.71x = 3,185.85 × 663.01
4. Step 4: Simplify right side
   2,123.71x = 2,112,250.41
5. Step 5: Solve for x
   x = 2,112,250.41/2,123.71
6. Step 6: Final answer
   x = 994.60