Finding the Fourth Proportional to 1,575.45, 2,174.16 and 867.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,575.45 : 2,174.16 = 867.31 : x
2. Step 2: Convert to fraction form
   1,575.45/2,174.16 = 867.31/x
3. Step 3: Cross multiply
   1,575.45x = 2,174.16 × 867.31
4. Step 4: Simplify right side
   1,575.45x = 1,885,670.71
5. Step 5: Solve for x
   x = 1,885,670.71/1,575.45
6. Step 6: Final answer
   x = 1,196.91