Finding the Fourth Proportional to 2,018.72, 2,785.80 and 1,134.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,018.72 : 2,785.80 = 1,134.32 : x
2. Step 2: Convert to fraction form
   2,018.72/2,785.80 = 1,134.32/x
3. Step 3: Cross multiply
   2,018.72x = 2,785.80 × 1,134.32
4. Step 4: Simplify right side
   2,018.72x = 3,159,988.66
5. Step 5: Solve for x
   x = 3,159,988.66/2,018.72
6. Step 6: Final answer
   x = 1,565.34