Finding the Fourth Proportional to 31,315.79, 43,223.94 and 19,372.16

Step by Step Solution

1. Step 1: Write the proportion equation
   31,315.79 : 43,223.94 = 19,372.16 : x
2. Step 2: Convert to fraction form
   31,315.79/43,223.94 = 19,372.16/x
3. Step 3: Cross multiply
   31,315.79x = 43,223.94 × 19,372.16
4. Step 4: Simplify right side
   31,315.79x = 837,340,865.39
5. Step 5: Solve for x
   x = 837,340,865.39/31,315.79
6. Step 6: Final answer
   x = 26,738.62