Finding the Fourth Proportional to 1,043.12, 1,561.62 and 974.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,043.12 : 1,561.62 = 974.72 : x
2. Step 2: Convert to fraction form
   1,043.12/1,561.62 = 974.72/x
3. Step 3: Cross multiply
   1,043.12x = 1,561.62 × 974.72
4. Step 4: Simplify right side
   1,043.12x = 1,522,142.25
5. Step 5: Solve for x
   x = 1,522,142.25/1,043.12
6. Step 6: Final answer
   x = 1,459.22