Finding the Fourth Proportional to 1,985.19, 2,978.79 and 1,441.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,985.19 : 2,978.79 = 1,441.86 : x
2. Step 2: Convert to fraction form
   1,985.19/2,978.79 = 1,441.86/x
3. Step 3: Cross multiply
   1,985.19x = 2,978.79 × 1,441.86
4. Step 4: Simplify right side
   1,985.19x = 4,294,998.15
5. Step 5: Solve for x
   x = 4,294,998.15/1,985.19
6. Step 6: Final answer
   x = 2,163.52