Finding the Fourth Proportional to 20,932.34, 28,900.14 and 12,983

Step by Step Solution

1. Step 1: Write the proportion equation
   20,932.34 : 28,900.14 = 12,983 : x
2. Step 2: Convert to fraction form
   20,932.34/28,900.14 = 12,983/x
3. Step 3: Cross multiply
   20,932.34x = 28,900.14 × 12,983
4. Step 4: Simplify right side
   20,932.34x = 375,210,517.62
5. Step 5: Solve for x
   x = 375,210,517.62/20,932.34
6. Step 6: Final answer
   x = 17,924.92