Finding the Fourth Proportional to 16,943.53, 23,381.72 and 9,389.80

Step by Step Solution

1. Step 1: Write the proportion equation
   16,943.53 : 23,381.72 = 9,389.80 : x
2. Step 2: Convert to fraction form
   16,943.53/23,381.72 = 9,389.80/x
3. Step 3: Cross multiply
   16,943.53x = 23,381.72 × 9,389.80
4. Step 4: Simplify right side
   16,943.53x = 219,549,510.60
5. Step 5: Solve for x
   x = 219,549,510.60/16,943.53
6. Step 6: Final answer
   x = 12,957.72