Finding the Fourth Proportional to 21,184.78, 31,777.35 and 5,389.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,184.78 : 31,777.35 = 5,389.83 : x
2. Step 2: Convert to fraction form
   21,184.78/31,777.35 = 5,389.83/x
3. Step 3: Cross multiply
   21,184.78x = 31,777.35 × 5,389.83
4. Step 4: Simplify right side
   21,184.78x = 171,274,355.46
5. Step 5: Solve for x
   x = 171,274,355.46/21,184.78
6. Step 6: Final answer
   x = 8,084.78