Finding the Fourth Proportional to 1,426.64, 1,966.56 and 1,177.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.64 : 1,966.56 = 1,177.58 : x
2. Step 2: Convert to fraction form
   1,426.64/1,966.56 = 1,177.58/x
3. Step 3: Cross multiply
   1,426.64x = 1,966.56 × 1,177.58
4. Step 4: Simplify right side
   1,426.64x = 2,315,781.72
5. Step 5: Solve for x
   x = 2,315,781.72/1,426.64
6. Step 6: Final answer
   x = 1,623.24