Finding the Fourth Proportional to 1,742.16, 2,404.18 and 956.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,742.16 : 2,404.18 = 956.21 : x
2. Step 2: Convert to fraction form
   1,742.16/2,404.18 = 956.21/x
3. Step 3: Cross multiply
   1,742.16x = 2,404.18 × 956.21
4. Step 4: Simplify right side
   1,742.16x = 2,298,886.55
5. Step 5: Solve for x
   x = 2,298,886.55/1,742.16
6. Step 6: Final answer
   x = 1,319.56