Finding the Fourth Proportional to 1,375.60, 1,897.32 and 877.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.60 : 1,897.32 = 877.84 : x
2. Step 2: Convert to fraction form
   1,375.60/1,897.32 = 877.84/x
3. Step 3: Cross multiply
   1,375.60x = 1,897.32 × 877.84
4. Step 4: Simplify right side
   1,375.60x = 1,665,543.39
5. Step 5: Solve for x
   x = 1,665,543.39/1,375.60
6. Step 6: Final answer
   x = 1,210.78