Finding the Fourth Proportional to 1,978.78, 2,968.28 and 591.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.78 : 2,968.28 = 591.97 : x
2. Step 2: Convert to fraction form
   1,978.78/2,968.28 = 591.97/x
3. Step 3: Cross multiply
   1,978.78x = 2,968.28 × 591.97
4. Step 4: Simplify right side
   1,978.78x = 1,757,136.79
5. Step 5: Solve for x
   x = 1,757,136.79/1,978.78
6. Step 6: Final answer
   x = 887.99