Finding the Fourth Proportional to 957.71, 1,321.59 and 538.05

Step by Step Solution

1. Step 1: Write the proportion equation
   957.71 : 1,321.59 = 538.05 : x
2. Step 2: Convert to fraction form
   957.71/1,321.59 = 538.05/x
3. Step 3: Cross multiply
   957.71x = 1,321.59 × 538.05
4. Step 4: Simplify right side
   957.71x = 711,081.50
5. Step 5: Solve for x
   x = 711,081.50/957.71
6. Step 6: Final answer
   x = 742.48