Finding the Fourth Proportional to 31,223.88, 43,075.89 and 20,471.34

Step by Step Solution

1. Step 1: Write the proportion equation
   31,223.88 : 43,075.89 = 20,471.34 : x
2. Step 2: Convert to fraction form
   31,223.88/43,075.89 = 20,471.34/x
3. Step 3: Cross multiply
   31,223.88x = 43,075.89 × 20,471.34
4. Step 4: Simplify right side
   31,223.88x = 881,821,189.99
5. Step 5: Solve for x
   x = 881,821,189.99/31,223.88
6. Step 6: Final answer
   x = 28,241.88