Finding the Fourth Proportional to 1,377.05, 1,900.70 and 852.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.05 : 1,900.70 = 852.79 : x
2. Step 2: Convert to fraction form
   1,377.05/1,900.70 = 852.79/x
3. Step 3: Cross multiply
   1,377.05x = 1,900.70 × 852.79
4. Step 4: Simplify right side
   1,377.05x = 1,620,897.95
5. Step 5: Solve for x
   x = 1,620,897.95/1,377.05
6. Step 6: Final answer
   x = 1,177.08