Finding the Fourth Proportional to 1,521.21, 2,100.76 and 1,050.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,521.21 : 2,100.76 = 1,050.31 : x
2. Step 2: Convert to fraction form
   1,521.21/2,100.76 = 1,050.31/x
3. Step 3: Cross multiply
   1,521.21x = 2,100.76 × 1,050.31
4. Step 4: Simplify right side
   1,521.21x = 2,206,449.24
5. Step 5: Solve for x
   x = 2,206,449.24/1,521.21
6. Step 6: Final answer
   x = 1,450.46