Finding the Fourth Proportional to 1,284.56, 1,927.50 and 554.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,284.56 : 1,927.50 = 554.14 : x
2. Step 2: Convert to fraction form
   1,284.56/1,927.50 = 554.14/x
3. Step 3: Cross multiply
   1,284.56x = 1,927.50 × 554.14
4. Step 4: Simplify right side
   1,284.56x = 1,068,105.18
5. Step 5: Solve for x
   x = 1,068,105.18/1,284.56
6. Step 6: Final answer
   x = 831.50