Finding the Fourth Proportional to 1,476.72, 2,214.72 and 928.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,476.72 : 2,214.72 = 928.08 : x
2. Step 2: Convert to fraction form
   1,476.72/2,214.72 = 928.08/x
3. Step 3: Cross multiply
   1,476.72x = 2,214.72 × 928.08
4. Step 4: Simplify right side
   1,476.72x = 2,055,437.34
5. Step 5: Solve for x
   x = 2,055,437.34/1,476.72
6. Step 6: Final answer
   x = 1,391.89