Finding the Fourth Proportional to 1,885.47, 2,828.72 and 911.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,885.47 : 2,828.72 = 911.58 : x
2. Step 2: Convert to fraction form
   1,885.47/2,828.72 = 911.58/x
3. Step 3: Cross multiply
   1,885.47x = 2,828.72 × 911.58
4. Step 4: Simplify right side
   1,885.47x = 2,578,604.58
5. Step 5: Solve for x
   x = 2,578,604.58/1,885.47
6. Step 6: Final answer
   x = 1,367.62