Finding the Fourth Proportional to 70,758.09, 106,100.55 and 20,831.72

Step by Step Solution

1. Step 1: Write the proportion equation
   70,758.09 : 106,100.55 = 20,831.72 : x
2. Step 2: Convert to fraction form
   70,758.09/106,100.55 = 20,831.72/x
3. Step 3: Cross multiply
   70,758.09x = 106,100.55 × 20,831.72
4. Step 4: Simplify right side
   70,758.09x = 2,210,256,418.94
5. Step 5: Solve for x
   x = 2,210,256,418.94/70,758.09
6. Step 6: Final answer
   x = 31,236.80