Finding the Fourth Proportional to 1,958.58, 2,938.51 and 863.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,958.58 : 2,938.51 = 863.86 : x
2. Step 2: Convert to fraction form
   1,958.58/2,938.51 = 863.86/x
3. Step 3: Cross multiply
   1,958.58x = 2,938.51 × 863.86
4. Step 4: Simplify right side
   1,958.58x = 2,538,461.25
5. Step 5: Solve for x
   x = 2,538,461.25/1,958.58
6. Step 6: Final answer
   x = 1,296.07