Finding the Fourth Proportional to 1,375.33, 1,897.51 and 878.14

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.33 : 1,897.51 = 878.14 : x
2. Step 2: Convert to fraction form
   1,375.33/1,897.51 = 878.14/x
3. Step 3: Cross multiply
   1,375.33x = 1,897.51 × 878.14
4. Step 4: Simplify right side
   1,375.33x = 1,666,279.43
5. Step 5: Solve for x
   x = 1,666,279.43/1,375.33
6. Step 6: Final answer
   x = 1,211.55