Finding the Fourth Proportional to 1,377.49, 1,901.01 and 853.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.49 : 1,901.01 = 853.42 : x
2. Step 2: Convert to fraction form
   1,377.49/1,901.01 = 853.42/x
3. Step 3: Cross multiply
   1,377.49x = 1,901.01 × 853.42
4. Step 4: Simplify right side
   1,377.49x = 1,622,359.95
5. Step 5: Solve for x
   x = 1,622,359.95/1,377.49
6. Step 6: Final answer
   x = 1,177.77