Finding the Fourth Proportional to 1,142.72, 1,705.72 and 981.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,142.72 : 1,705.72 = 981.44 : x
2. Step 2: Convert to fraction form
   1,142.72/1,705.72 = 981.44/x
3. Step 3: Cross multiply
   1,142.72x = 1,705.72 × 981.44
4. Step 4: Simplify right side
   1,142.72x = 1,674,061.84
5. Step 5: Solve for x
   x = 1,674,061.84/1,142.72
6. Step 6: Final answer
   x = 1,464.98