Finding the Fourth Proportional to 2,359.40, 3,538.89 and 971.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,359.40 : 3,538.89 = 971.87 : x
2. Step 2: Convert to fraction form
   2,359.40/3,538.89 = 971.87/x
3. Step 3: Cross multiply
   2,359.40x = 3,538.89 × 971.87
4. Step 4: Simplify right side
   2,359.40x = 3,439,323.33
5. Step 5: Solve for x
   x = 3,439,323.33/2,359.40
6. Step 6: Final answer
   x = 1,457.71