Finding the Fourth Proportional to 1,427.37, 2,139.42 and 656.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.37 : 2,139.42 = 656.25 : x
2. Step 2: Convert to fraction form
   1,427.37/2,139.42 = 656.25/x
3. Step 3: Cross multiply
   1,427.37x = 2,139.42 × 656.25
4. Step 4: Simplify right side
   1,427.37x = 1,403,994.38
5. Step 5: Solve for x
   x = 1,403,994.38/1,427.37
6. Step 6: Final answer
   x = 983.62