Finding the Fourth Proportional to 1,973.40, 2,961.69 and 819.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,973.40 : 2,961.69 = 819.96 : x
2. Step 2: Convert to fraction form
   1,973.40/2,961.69 = 819.96/x
3. Step 3: Cross multiply
   1,973.40x = 2,961.69 × 819.96
4. Step 4: Simplify right side
   1,973.40x = 2,428,467.33
5. Step 5: Solve for x
   x = 2,428,467.33/1,973.40
6. Step 6: Final answer
   x = 1,230.60