Finding the Fourth Proportional to 1,857.61, 2,785.74 and 761.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,857.61 : 2,785.74 = 761.37 : x
2. Step 2: Convert to fraction form
   1,857.61/2,785.74 = 761.37/x
3. Step 3: Cross multiply
   1,857.61x = 2,785.74 × 761.37
4. Step 4: Simplify right side
   1,857.61x = 2,120,978.86
5. Step 5: Solve for x
   x = 2,120,978.86/1,857.61
6. Step 6: Final answer
   x = 1,141.78