Finding the Fourth Proportional to 1,074.72, 1,611.52 and 554.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.72 : 1,611.52 = 554.72 : x
2. Step 2: Convert to fraction form
   1,074.72/1,611.52 = 554.72/x
3. Step 3: Cross multiply
   1,074.72x = 1,611.52 × 554.72
4. Step 4: Simplify right side
   1,074.72x = 893,942.37
5. Step 5: Solve for x
   x = 893,942.37/1,074.72
6. Step 6: Final answer
   x = 831.79