Finding the Fourth Proportional to 1,637.57, 2,258.05 and 1,425.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,637.57 : 2,258.05 = 1,425.86 : x
2. Step 2: Convert to fraction form
   1,637.57/2,258.05 = 1,425.86/x
3. Step 3: Cross multiply
   1,637.57x = 2,258.05 × 1,425.86
4. Step 4: Simplify right side
   1,637.57x = 3,219,651.88
5. Step 5: Solve for x
   x = 3,219,651.88/1,637.57
6. Step 6: Final answer
   x = 1,966.12