Finding the Fourth Proportional to 55,431.34, 83,144.48 and 20,368.42

Step by Step Solution

1. Step 1: Write the proportion equation
   55,431.34 : 83,144.48 = 20,368.42 : x
2. Step 2: Convert to fraction form
   55,431.34/83,144.48 = 20,368.42/x
3. Step 3: Cross multiply
   55,431.34x = 83,144.48 × 20,368.42
4. Step 4: Simplify right side
   55,431.34x = 1,693,521,689.32
5. Step 5: Solve for x
   x = 1,693,521,689.32/55,431.34
6. Step 6: Final answer
   x = 30,551.70