Finding the Fourth Proportional to 1,553.60, 2,320.52 and 1,120.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.60 : 2,320.52 = 1,120.48 : x
2. Step 2: Convert to fraction form
   1,553.60/2,320.52 = 1,120.48/x
3. Step 3: Cross multiply
   1,553.60x = 2,320.52 × 1,120.48
4. Step 4: Simplify right side
   1,553.60x = 2,600,096.25
5. Step 5: Solve for x
   x = 2,600,096.25/1,553.60
6. Step 6: Final answer
   x = 1,673.59