Finding the Fourth Proportional to 2,151.48, 3,226.77 and 981.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,151.48 : 3,226.77 = 981.15 : x
2. Step 2: Convert to fraction form
   2,151.48/3,226.77 = 981.15/x
3. Step 3: Cross multiply
   2,151.48x = 3,226.77 × 981.15
4. Step 4: Simplify right side
   2,151.48x = 3,165,945.39
5. Step 5: Solve for x
   x = 3,165,945.39/2,151.48
6. Step 6: Final answer
   x = 1,471.52