Finding the Fourth Proportional to 2,621.34, 3,931.38 and 1,159.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,621.34 : 3,931.38 = 1,159.68 : x
2. Step 2: Convert to fraction form
   2,621.34/3,931.38 = 1,159.68/x
3. Step 3: Cross multiply
   2,621.34x = 3,931.38 × 1,159.68
4. Step 4: Simplify right side
   2,621.34x = 4,559,142.76
5. Step 5: Solve for x
   x = 4,559,142.76/2,621.34
6. Step 6: Final answer
   x = 1,739.24