Finding the Fourth Proportional to 1,501.83, 2,071.80 and 911.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.83 : 2,071.80 = 911.97 : x
2. Step 2: Convert to fraction form
   1,501.83/2,071.80 = 911.97/x
3. Step 3: Cross multiply
   1,501.83x = 2,071.80 × 911.97
4. Step 4: Simplify right side
   1,501.83x = 1,889,419.45
5. Step 5: Solve for x
   x = 1,889,419.45/1,501.83
6. Step 6: Final answer
   x = 1,258.08