Finding the Fourth Proportional to 2,013.60, 2,781.60 and 1,553.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,013.60 : 2,781.60 = 1,553.76 : x
2. Step 2: Convert to fraction form
   2,013.60/2,781.60 = 1,553.76/x
3. Step 3: Cross multiply
   2,013.60x = 2,781.60 × 1,553.76
4. Step 4: Simplify right side
   2,013.60x = 4,321,938.82
5. Step 5: Solve for x
   x = 4,321,938.82/2,013.60
6. Step 6: Final answer
   x = 2,146.37