Finding the Fourth Proportional to 1,575.86, 2,174.72 and 867.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,575.86 : 2,174.72 = 867.76 : x
2. Step 2: Convert to fraction form
   1,575.86/2,174.72 = 867.76/x
3. Step 3: Cross multiply
   1,575.86x = 2,174.72 × 867.76
4. Step 4: Simplify right side
   1,575.86x = 1,887,135.03
5. Step 5: Solve for x
   x = 1,887,135.03/1,575.86
6. Step 6: Final answer
   x = 1,197.53