Finding the Fourth Proportional to 40,291.31, 55,603 and 22,141.90

Step by Step Solution

1. Step 1: Write the proportion equation
   40,291.31 : 55,603 = 22,141.90 : x
2. Step 2: Convert to fraction form
   40,291.31/55,603 = 22,141.90/x
3. Step 3: Cross multiply
   40,291.31x = 55,603 × 22,141.90
4. Step 4: Simplify right side
   40,291.31x = 1,231,155,787.69
5. Step 5: Solve for x
   x = 1,231,155,787.69/40,291.31
6. Step 6: Final answer
   x = 30,556.36