Finding the Fourth Proportional to 1,552.21, 2,142.05 and 889.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,552.21 : 2,142.05 = 889.12 : x
2. Step 2: Convert to fraction form
   1,552.21/2,142.05 = 889.12/x
3. Step 3: Cross multiply
   1,552.21x = 2,142.05 × 889.12
4. Step 4: Simplify right side
   1,552.21x = 1,904,539.50
5. Step 5: Solve for x
   x = 1,904,539.50/1,552.21
6. Step 6: Final answer
   x = 1,226.99