Finding the Fourth Proportional to 31,419.45, 43,341.53 and 19,913.31

Step by Step Solution

1. Step 1: Write the proportion equation
   31,419.45 : 43,341.53 = 19,913.31 : x
2. Step 2: Convert to fraction form
   31,419.45/43,341.53 = 19,913.31/x
3. Step 3: Cross multiply
   31,419.45x = 43,341.53 × 19,913.31
4. Step 4: Simplify right side
   31,419.45x = 863,073,322.76
5. Step 5: Solve for x
   x = 863,073,322.76/31,419.45
6. Step 6: Final answer
   x = 27,469.40