Finding the Fourth Proportional to 1,074.72, 1,612.50 and 381.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.72 : 1,612.50 = 381.46 : x
2. Step 2: Convert to fraction form
   1,074.72/1,612.50 = 381.46/x
3. Step 3: Cross multiply
   1,074.72x = 1,612.50 × 381.46
4. Step 4: Simplify right side
   1,074.72x = 615,109.23
5. Step 5: Solve for x
   x = 615,109.23/1,074.72
6. Step 6: Final answer
   x = 572.34