Finding the Fourth Proportional to 1,375.18, 1,897.98 and 877.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.18 : 1,897.98 = 877.30 : x
2. Step 2: Convert to fraction form
   1,375.18/1,897.98 = 877.30/x
3. Step 3: Cross multiply
   1,375.18x = 1,897.98 × 877.30
4. Step 4: Simplify right side
   1,375.18x = 1,665,097.85
5. Step 5: Solve for x
   x = 1,665,097.85/1,375.18
6. Step 6: Final answer
   x = 1,210.82