Finding the Fourth Proportional to 16,931.17, 23,364.32 and 9,377.05

Step by Step Solution

1. Step 1: Write the proportion equation
   16,931.17 : 23,364.32 = 9,377.05 : x
2. Step 2: Convert to fraction form
   16,931.17/23,364.32 = 9,377.05/x
3. Step 3: Cross multiply
   16,931.17x = 23,364.32 × 9,377.05
4. Step 4: Simplify right side
   16,931.17x = 219,088,420.30
5. Step 5: Solve for x
   x = 219,088,420.30/16,931.17
6. Step 6: Final answer
   x = 12,939.95