Finding the Fourth Proportional to 1,978.59, 2,964.24 and 880.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.59 : 2,964.24 = 880.23 : x
2. Step 2: Convert to fraction form
   1,978.59/2,964.24 = 880.23/x
3. Step 3: Cross multiply
   1,978.59x = 2,964.24 × 880.23
4. Step 4: Simplify right side
   1,978.59x = 2,609,212.98
5. Step 5: Solve for x
   x = 2,609,212.98/1,978.59
6. Step 6: Final answer
   x = 1,318.72