Finding the Fourth Proportional to 1,091.34, 1,628.57 and 974.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.34 : 1,628.57 = 974.53 : x
2. Step 2: Convert to fraction form
   1,091.34/1,628.57 = 974.53/x
3. Step 3: Cross multiply
   1,091.34x = 1,628.57 × 974.53
4. Step 4: Simplify right side
   1,091.34x = 1,587,088.69
5. Step 5: Solve for x
   x = 1,587,088.69/1,091.34
6. Step 6: Final answer
   x = 1,454.26