Finding the Fourth Proportional to 1,267.31, 1,899.72 and 574.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,267.31 : 1,899.72 = 574.49 : x
2. Step 2: Convert to fraction form
   1,267.31/1,899.72 = 574.49/x
3. Step 3: Cross multiply
   1,267.31x = 1,899.72 × 574.49
4. Step 4: Simplify right side
   1,267.31x = 1,091,374.89
5. Step 5: Solve for x
   x = 1,091,374.89/1,267.31
6. Step 6: Final answer
   x = 861.17