Finding the Fourth Proportional to 12,974.81, 17,906.15 and 7,385.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,974.81 : 17,906.15 = 7,385.81 : x
2. Step 2: Convert to fraction form
   12,974.81/17,906.15 = 7,385.81/x
3. Step 3: Cross multiply
   12,974.81x = 17,906.15 × 7,385.81
4. Step 4: Simplify right side
   12,974.81x = 132,251,384.80
5. Step 5: Solve for x
   x = 132,251,384.80/12,974.81
6. Step 6: Final answer
   x = 10,192.93