Finding the Fourth Proportional to 1,091.46, 1,634.84 and 993.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.46 : 1,634.84 = 993.42 : x
2. Step 2: Convert to fraction form
   1,091.46/1,634.84 = 993.42/x
3. Step 3: Cross multiply
   1,091.46x = 1,634.84 × 993.42
4. Step 4: Simplify right side
   1,091.46x = 1,624,082.75
5. Step 5: Solve for x
   x = 1,624,082.75/1,091.46
6. Step 6: Final answer
   x = 1,487.99