Finding the Fourth Proportional to 1,501.47, 2,071.82 and 911.90

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.47 : 2,071.82 = 911.90 : x
2. Step 2: Convert to fraction form
   1,501.47/2,071.82 = 911.90/x
3. Step 3: Cross multiply
   1,501.47x = 2,071.82 × 911.90
4. Step 4: Simplify right side
   1,501.47x = 1,889,300.12
5. Step 5: Solve for x
   x = 1,889,300.12/1,501.47
6. Step 6: Final answer
   x = 1,258.30