Finding the Fourth Proportional to 1,375.58, 1,898.37 and 877.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.58 : 1,898.37 = 877.82 : x
2. Step 2: Convert to fraction form
   1,375.58/1,898.37 = 877.82/x
3. Step 3: Cross multiply
   1,375.58x = 1,898.37 × 877.82
4. Step 4: Simplify right side
   1,375.58x = 1,666,427.15
5. Step 5: Solve for x
   x = 1,666,427.15/1,375.58
6. Step 6: Final answer
   x = 1,211.44