Finding the Fourth Proportional to 1,978.57, 2,968.71 and 937.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.57 : 2,968.71 = 937.99 : x
2. Step 2: Convert to fraction form
   1,978.57/2,968.71 = 937.99/x
3. Step 3: Cross multiply
   1,978.57x = 2,968.71 × 937.99
4. Step 4: Simplify right side
   1,978.57x = 2,784,620.29
5. Step 5: Solve for x
   x = 2,784,620.29/1,978.57
6. Step 6: Final answer
   x = 1,407.39