Finding the Fourth Proportional to 12,931.94, 19,403.67 and 6,774.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,931.94 : 19,403.67 = 6,774.50 : x
2. Step 2: Convert to fraction form
   12,931.94/19,403.67 = 6,774.50/x
3. Step 3: Cross multiply
   12,931.94x = 19,403.67 × 6,774.50
4. Step 4: Simplify right side
   12,931.94x = 131,450,162.42
5. Step 5: Solve for x
   x = 131,450,162.42/12,931.94
6. Step 6: Final answer
   x = 10,164.77