Finding the Fourth Proportional to 3,386.52, 5,079.18 and 921.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,386.52 : 5,079.18 = 921.54 : x
2. Step 2: Convert to fraction form
   3,386.52/5,079.18 = 921.54/x
3. Step 3: Cross multiply
   3,386.52x = 5,079.18 × 921.54
4. Step 4: Simplify right side
   3,386.52x = 4,680,667.54
5. Step 5: Solve for x
   x = 4,680,667.54/3,386.52
6. Step 6: Final answer
   x = 1,382.15