Finding the Fourth Proportional to 1,487.86, 2,054.28 and 928.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,487.86 : 2,054.28 = 928.44 : x
2. Step 2: Convert to fraction form
   1,487.86/2,054.28 = 928.44/x
3. Step 3: Cross multiply
   1,487.86x = 2,054.28 × 928.44
4. Step 4: Simplify right side
   1,487.86x = 1,907,275.72
5. Step 5: Solve for x
   x = 1,907,275.72/1,487.86
6. Step 6: Final answer
   x = 1,281.89