Finding the Fourth Proportional to 2,525.34, 3,789.12 and 1,428.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,525.34 : 3,789.12 = 1,428.06 : x
2. Step 2: Convert to fraction form
   2,525.34/3,789.12 = 1,428.06/x
3. Step 3: Cross multiply
   2,525.34x = 3,789.12 × 1,428.06
4. Step 4: Simplify right side
   2,525.34x = 5,411,090.71
5. Step 5: Solve for x
   x = 5,411,090.71/2,525.34
6. Step 6: Final answer
   x = 2,142.72