Finding the Fourth Proportional to 1,978.16, 2,729.51 and 1,604.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.16 : 2,729.51 = 1,604.50 : x
2. Step 2: Convert to fraction form
   1,978.16/2,729.51 = 1,604.50/x
3. Step 3: Cross multiply
   1,978.16x = 2,729.51 × 1,604.50
4. Step 4: Simplify right side
   1,978.16x = 4,379,498.80
5. Step 5: Solve for x
   x = 4,379,498.80/1,978.16
6. Step 6: Final answer
   x = 2,213.93