Finding the Fourth Proportional to 1,026.56, 1,415.68 and 974.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,026.56 : 1,415.68 = 974.72 : x
2. Step 2: Convert to fraction form
   1,026.56/1,415.68 = 974.72/x
3. Step 3: Cross multiply
   1,026.56x = 1,415.68 × 974.72
4. Step 4: Simplify right side
   1,026.56x = 1,379,891.61
5. Step 5: Solve for x
   x = 1,379,891.61/1,026.56
6. Step 6: Final answer
   x = 1,344.19