Finding the Fourth Proportional to 1,427.38, 2,139.42 and 656.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.38 : 2,139.42 = 656.26 : x
2. Step 2: Convert to fraction form
   1,427.38/2,139.42 = 656.26/x
3. Step 3: Cross multiply
   1,427.38x = 2,139.42 × 656.26
4. Step 4: Simplify right side
   1,427.38x = 1,404,015.77
5. Step 5: Solve for x
   x = 1,404,015.77/1,427.38
6. Step 6: Final answer
   x = 983.63