Finding the Fourth Proportional to 21,328.50, 29,429.69 and 12,373.95

Step by Step Solution

1. Step 1: Write the proportion equation
   21,328.50 : 29,429.69 = 12,373.95 : x
2. Step 2: Convert to fraction form
   21,328.50/29,429.69 = 12,373.95/x
3. Step 3: Cross multiply
   21,328.50x = 29,429.69 × 12,373.95
4. Step 4: Simplify right side
   21,328.50x = 364,161,450.71
5. Step 5: Solve for x
   x = 364,161,450.71/21,328.50
6. Step 6: Final answer
   x = 17,073.94