Finding the Fourth Proportional to 1,500.28, 2,071.50 and 911.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,500.28 : 2,071.50 = 911.61 : x
2. Step 2: Convert to fraction form
   1,500.28/2,071.50 = 911.61/x
3. Step 3: Cross multiply
   1,500.28x = 2,071.50 × 911.61
4. Step 4: Simplify right side
   1,500.28x = 1,888,400.12
5. Step 5: Solve for x
   x = 1,888,400.12/1,500.28
6. Step 6: Final answer
   x = 1,258.70