Finding the Fourth Proportional to 1,837.56, 2,535.72 and 1,129.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,837.56 : 2,535.72 = 1,129.20 : x
2. Step 2: Convert to fraction form
   1,837.56/2,535.72 = 1,129.20/x
3. Step 3: Cross multiply
   1,837.56x = 2,535.72 × 1,129.20
4. Step 4: Simplify right side
   1,837.56x = 2,863,335.02
5. Step 5: Solve for x
   x = 2,863,335.02/1,837.56
6. Step 6: Final answer
   x = 1,558.23