Finding the Fourth Proportional to 1,359.78, 1,877.55 and 887.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.78 : 1,877.55 = 887.82 : x
2. Step 2: Convert to fraction form
   1,359.78/1,877.55 = 887.82/x
3. Step 3: Cross multiply
   1,359.78x = 1,877.55 × 887.82
4. Step 4: Simplify right side
   1,359.78x = 1,666,926.44
5. Step 5: Solve for x
   x = 1,666,926.44/1,359.78
6. Step 6: Final answer
   x = 1,225.88