Finding the Fourth Proportional to 1,501.37, 2,071.92 and 911.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.37 : 2,071.92 = 911.55 : x
2. Step 2: Convert to fraction form
   1,501.37/2,071.92 = 911.55/x
3. Step 3: Cross multiply
   1,501.37x = 2,071.92 × 911.55
4. Step 4: Simplify right side
   1,501.37x = 1,888,658.68
5. Step 5: Solve for x
   x = 1,888,658.68/1,501.37
6. Step 6: Final answer
   x = 1,257.96