Finding the Fourth Proportional to 31,377.98, 43,335.60 and 19,469.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,377.98 : 43,335.60 = 19,469.72 : x
2. Step 2: Convert to fraction form
   31,377.98/43,335.60 = 19,469.72/x
3. Step 3: Cross multiply
   31,377.98x = 43,335.60 × 19,469.72
4. Step 4: Simplify right side
   31,377.98x = 843,731,998.03
5. Step 5: Solve for x
   x = 843,731,998.03/31,377.98
6. Step 6: Final answer
   x = 26,889.30