Finding the Fourth Proportional to 20,557.88, 30,818.31 and 7,401

Step by Step Solution

1. Step 1: Write the proportion equation
   20,557.88 : 30,818.31 = 7,401 : x
2. Step 2: Convert to fraction form
   20,557.88/30,818.31 = 7,401/x
3. Step 3: Cross multiply
   20,557.88x = 30,818.31 × 7,401
4. Step 4: Simplify right side
   20,557.88x = 228,086,312.31
5. Step 5: Solve for x
   x = 228,086,312.31/20,557.88
6. Step 6: Final answer
   x = 11,094.84