Finding the Fourth Proportional to 1,379.89, 1,904.51 and 882.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,379.89 : 1,904.51 = 882.74 : x
2. Step 2: Convert to fraction form
   1,379.89/1,904.51 = 882.74/x
3. Step 3: Cross multiply
   1,379.89x = 1,904.51 × 882.74
4. Step 4: Simplify right side
   1,379.89x = 1,681,187.16
5. Step 5: Solve for x
   x = 1,681,187.16/1,379.89
6. Step 6: Final answer
   x = 1,218.35