Finding the Fourth Proportional to 20,868.62, 28,801.32 and 12,372.62

Step by Step Solution

1. Step 1: Write the proportion equation
   20,868.62 : 28,801.32 = 12,372.62 : x
2. Step 2: Convert to fraction form
   20,868.62/28,801.32 = 12,372.62/x
3. Step 3: Cross multiply
   20,868.62x = 28,801.32 × 12,372.62
4. Step 4: Simplify right side
   20,868.62x = 356,347,787.86
5. Step 5: Solve for x
   x = 356,347,787.86/20,868.62
6. Step 6: Final answer
   x = 17,075.77