Finding the Fourth Proportional to 1,525.39, 2,283.72 and 1,428.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,525.39 : 2,283.72 = 1,428.51 : x
2. Step 2: Convert to fraction form
   1,525.39/2,283.72 = 1,428.51/x
3. Step 3: Cross multiply
   1,525.39x = 2,283.72 × 1,428.51
4. Step 4: Simplify right side
   1,525.39x = 3,262,328.91
5. Step 5: Solve for x
   x = 3,262,328.91/1,525.39
6. Step 6: Final answer
   x = 2,138.69