Finding the Fourth Proportional to 1,681.56, 2,525.01 and 1,388.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681.56 : 2,525.01 = 1,388.42 : x
2. Step 2: Convert to fraction form
   1,681.56/2,525.01 = 1,388.42/x
3. Step 3: Cross multiply
   1,681.56x = 2,525.01 × 1,388.42
4. Step 4: Simplify right side
   1,681.56x = 3,505,761.76
5. Step 5: Solve for x
   x = 3,505,761.76/1,681.56
6. Step 6: Final answer
   x = 2,084.83