Finding the Fourth Proportional to 1,540.43, 2,127.35 and 981.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,540.43 : 2,127.35 = 981.15 : x
2. Step 2: Convert to fraction form
   1,540.43/2,127.35 = 981.15/x
3. Step 3: Cross multiply
   1,540.43x = 2,127.35 × 981.15
4. Step 4: Simplify right side
   1,540.43x = 2,087,240.56
5. Step 5: Solve for x
   x = 2,087,240.56/1,540.43
6. Step 6: Final answer
   x = 1,354.97