Finding the Fourth Proportional to 16,981.57, 23,435.32 and 9,428.00

Step by Step Solution

1. Step 1: Write the proportion equation
   16,981.57 : 23,435.32 = 9,428.00 : x
2. Step 2: Convert to fraction form
   16,981.57/23,435.32 = 9,428.00/x
3. Step 3: Cross multiply
   16,981.57x = 23,435.32 × 9,428.00
4. Step 4: Simplify right side
   16,981.57x = 220,948,296.63
5. Step 5: Solve for x
   x = 220,948,296.63/16,981.57
6. Step 6: Final answer
   x = 13,011.07