Finding the Fourth Proportional to 1,361.77, 1,878.70 and 889.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,361.77 : 1,878.70 = 889.52 : x
2. Step 2: Convert to fraction form
   1,361.77/1,878.70 = 889.52/x
3. Step 3: Cross multiply
   1,361.77x = 1,878.70 × 889.52
4. Step 4: Simplify right side
   1,361.77x = 1,671,141.22
5. Step 5: Solve for x
   x = 1,671,141.22/1,361.77
6. Step 6: Final answer
   x = 1,227.18