Finding the Fourth Proportional to 16,947.13, 23,384.82 and 9,777.31

Step by Step Solution

1. Step 1: Write the proportion equation
   16,947.13 : 23,384.82 = 9,777.31 : x
2. Step 2: Convert to fraction form
   16,947.13/23,384.82 = 9,777.31/x
3. Step 3: Cross multiply
   16,947.13x = 23,384.82 × 9,777.31
4. Step 4: Simplify right side
   16,947.13x = 228,640,585.55
5. Step 5: Solve for x
   x = 228,640,585.55/16,947.13
6. Step 6: Final answer
   x = 13,491.40