Finding the Fourth Proportional to 20,748.05, 31,106.12 and 10,742.06

Step by Step Solution

1. Step 1: Write the proportion equation
   20,748.05 : 31,106.12 = 10,742.06 : x
2. Step 2: Convert to fraction form
   20,748.05/31,106.12 = 10,742.06/x
3. Step 3: Cross multiply
   20,748.05x = 31,106.12 × 10,742.06
4. Step 4: Simplify right side
   20,748.05x = 334,143,831.46
5. Step 5: Solve for x
   x = 334,143,831.46/20,748.05
6. Step 6: Final answer
   x = 16,104.83