Finding the Fourth Proportional to 2,428.86, 3,642.33 and 889.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.86 : 3,642.33 = 889.98 : x
2. Step 2: Convert to fraction form
   2,428.86/3,642.33 = 889.98/x
3. Step 3: Cross multiply
   2,428.86x = 3,642.33 × 889.98
4. Step 4: Simplify right side
   2,428.86x = 3,241,600.85
5. Step 5: Solve for x
   x = 3,241,600.85/2,428.86
6. Step 6: Final answer
   x = 1,334.62