Finding the Fourth Proportional to 1,977.96, 2,964.89 and 807.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,977.96 : 2,964.89 = 807.45 : x
2. Step 2: Convert to fraction form
   1,977.96/2,964.89 = 807.45/x
3. Step 3: Cross multiply
   1,977.96x = 2,964.89 × 807.45
4. Step 4: Simplify right side
   1,977.96x = 2,393,996.39
5. Step 5: Solve for x
   x = 2,393,996.39/1,977.96
6. Step 6: Final answer
   x = 1,210.34