Finding the Fourth Proportional to 2,215.52, 3,320.84 and 981.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.52 : 3,320.84 = 981.99 : x
2. Step 2: Convert to fraction form
   2,215.52/3,320.84 = 981.99/x
3. Step 3: Cross multiply
   2,215.52x = 3,320.84 × 981.99
4. Step 4: Simplify right side
   2,215.52x = 3,261,026.76
5. Step 5: Solve for x
   x = 3,261,026.76/2,215.52
6. Step 6: Final answer
   x = 1,471.90