Finding the Fourth Proportional to 1,887.58, 2,828.47 and 791.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,887.58 : 2,828.47 = 791.34 : x
2. Step 2: Convert to fraction form
   1,887.58/2,828.47 = 791.34/x
3. Step 3: Cross multiply
   1,887.58x = 2,828.47 × 791.34
4. Step 4: Simplify right side
   1,887.58x = 2,238,281.45
5. Step 5: Solve for x
   x = 2,238,281.45/1,887.58
6. Step 6: Final answer
   x = 1,185.79