Finding the Fourth Proportional to 21,932.71, 30,239.71 and 18,303.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,932.71 : 30,239.71 = 18,303.98 : x
2. Step 2: Convert to fraction form
   21,932.71/30,239.71 = 18,303.98/x
3. Step 3: Cross multiply
   21,932.71x = 30,239.71 × 18,303.98
4. Step 4: Simplify right side
   21,932.71x = 553,507,047.05
5. Step 5: Solve for x
   x = 553,507,047.05/21,932.71
6. Step 6: Final answer
   x = 25,236.60