Finding the Fourth Proportional to 1,521.35, 2,100.71 and 962.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.35 : 2,100.71 = 962.72 : x
2. Step 2: Convert to fraction form
   1,521.35/2,100.71 = 962.72/x
3. Step 3: Cross multiply
   1,521.35x = 2,100.71 × 962.72
4. Step 4: Simplify right side
   1,521.35x = 2,022,390.72
5. Step 5: Solve for x
   x = 2,022,390.72/1,521.35
6. Step 6: Final answer
   x = 1,329.34