Finding the Fourth Proportional to 2,130.57, 3,196.77 and 1,157.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,130.57 : 3,196.77 = 1,157.37 : x
2. Step 2: Convert to fraction form
   2,130.57/3,196.77 = 1,157.37/x
3. Step 3: Cross multiply
   2,130.57x = 3,196.77 × 1,157.37
4. Step 4: Simplify right side
   2,130.57x = 3,699,845.69
5. Step 5: Solve for x
   x = 3,699,845.69/2,130.57
6. Step 6: Final answer
   x = 1,736.55