Finding the Fourth Proportional to 10,930.34, 16,395.69 and 3,138.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,930.34 : 16,395.69 = 3,138.50 : x
2. Step 2: Convert to fraction form
   10,930.34/16,395.69 = 3,138.50/x
3. Step 3: Cross multiply
   10,930.34x = 16,395.69 × 3,138.50
4. Step 4: Simplify right side
   10,930.34x = 51,457,873.07
5. Step 5: Solve for x
   x = 51,457,873.07/10,930.34
6. Step 6: Final answer
   x = 4,707.80