Finding the Fourth Proportional to 1,985.42, 2,978.01 and 889.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.42 : 2,978.01 = 889.49 : x
2. Step 2: Convert to fraction form
   1,985.42/2,978.01 = 889.49/x
3. Step 3: Cross multiply
   1,985.42x = 2,978.01 × 889.49
4. Step 4: Simplify right side
   1,985.42x = 2,648,910.11
5. Step 5: Solve for x
   x = 2,648,910.11/1,985.42
6. Step 6: Final answer
   x = 1,334.18