Finding the Fourth Proportional to 1,074.18, 1,472.72 and 1,054.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.18 : 1,472.72 = 1,054.74 : x
2. Step 2: Convert to fraction form
   1,074.18/1,472.72 = 1,054.74/x
3. Step 3: Cross multiply
   1,074.18x = 1,472.72 × 1,054.74
4. Step 4: Simplify right side
   1,074.18x = 1,553,331.42
5. Step 5: Solve for x
   x = 1,553,331.42/1,074.18
6. Step 6: Final answer
   x = 1,446.06