Finding the Fourth Proportional to 1,395.72, 1,926.40 and 954.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,395.72 : 1,926.40 = 954.68 : x
2. Step 2: Convert to fraction form
   1,395.72/1,926.40 = 954.68/x
3. Step 3: Cross multiply
   1,395.72x = 1,926.40 × 954.68
4. Step 4: Simplify right side
   1,395.72x = 1,839,095.55
5. Step 5: Solve for x
   x = 1,839,095.55/1,395.72
6. Step 6: Final answer
   x = 1,317.67