Finding the Fourth Proportional to 1,477.89, 2,217.69 and 554.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,477.89 : 2,217.69 = 554.10 : x
2. Step 2: Convert to fraction form
   1,477.89/2,217.69 = 554.10/x
3. Step 3: Cross multiply
   1,477.89x = 2,217.69 × 554.10
4. Step 4: Simplify right side
   1,477.89x = 1,228,810.94
5. Step 5: Solve for x
   x = 1,228,810.94/1,477.89
6. Step 6: Final answer
   x = 831.46