Finding the Fourth Proportional to 1,549.58, 2,138.25 and 981.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,549.58 : 2,138.25 = 981.72 : x
2. Step 2: Convert to fraction form
   1,549.58/2,138.25 = 981.72/x
3. Step 3: Cross multiply
   1,549.58x = 2,138.25 × 981.72
4. Step 4: Simplify right side
   1,549.58x = 2,099,160.95
5. Step 5: Solve for x
   x = 2,099,160.95/1,549.58
6. Step 6: Final answer
   x = 1,354.66