Finding the Fourth Proportional to 1,530.81, 2,112.83 and 971.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,530.81 : 2,112.83 = 971.96 : x
2. Step 2: Convert to fraction form
   1,530.81/2,112.83 = 971.96/x
3. Step 3: Cross multiply
   1,530.81x = 2,112.83 × 971.96
4. Step 4: Simplify right side
   1,530.81x = 2,053,570.82
5. Step 5: Solve for x
   x = 2,053,570.82/1,530.81
6. Step 6: Final answer
   x = 1,341.49