Finding the Fourth Proportional to 1,540.53, 2,125.59 and 980.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,540.53 : 2,125.59 = 980.81 : x
2. Step 2: Convert to fraction form
   1,540.53/2,125.59 = 980.81/x
3. Step 3: Cross multiply
   1,540.53x = 2,125.59 × 980.81
4. Step 4: Simplify right side
   1,540.53x = 2,084,789.30
5. Step 5: Solve for x
   x = 2,084,789.30/1,540.53
6. Step 6: Final answer
   x = 1,353.29