Finding the Fourth Proportional to 1,728.05, 2,384.49 and 981.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.05 : 2,384.49 = 981.86 : x
2. Step 2: Convert to fraction form
   1,728.05/2,384.49 = 981.86/x
3. Step 3: Cross multiply
   1,728.05x = 2,384.49 × 981.86
4. Step 4: Simplify right side
   1,728.05x = 2,341,223.43
5. Step 5: Solve for x
   x = 2,341,223.43/1,728.05
6. Step 6: Final answer
   x = 1,354.84