Finding the Fourth Proportional to 1,421.82, 2,134.89 and 981.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421.82 : 2,134.89 = 981.99 : x
2. Step 2: Convert to fraction form
   1,421.82/2,134.89 = 981.99/x
3. Step 3: Cross multiply
   1,421.82x = 2,134.89 × 981.99
4. Step 4: Simplify right side
   1,421.82x = 2,096,440.63
5. Step 5: Solve for x
   x = 2,096,440.63/1,421.82
6. Step 6: Final answer
   x = 1,474.48