Finding the Fourth Proportional to 1,686.30, 2,525.52 and 1,627.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686.30 : 2,525.52 = 1,627.91 : x
2. Step 2: Convert to fraction form
   1,686.30/2,525.52 = 1,627.91/x
3. Step 3: Cross multiply
   1,686.30x = 2,525.52 × 1,627.91
4. Step 4: Simplify right side
   1,686.30x = 4,111,306.64
5. Step 5: Solve for x
   x = 4,111,306.64/1,686.30
6. Step 6: Final answer
   x = 2,438.06