Finding the Fourth Proportional to 21,077.82, 31,644.52 and 19,337.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,077.82 : 31,644.52 = 19,337.10 : x
2. Step 2: Convert to fraction form
   21,077.82/31,644.52 = 19,337.10/x
3. Step 3: Cross multiply
   21,077.82x = 31,644.52 × 19,337.10
4. Step 4: Simplify right side
   21,077.82x = 611,913,456.45
5. Step 5: Solve for x
   x = 611,913,456.45/21,077.82
6. Step 6: Final answer
   x = 29,031.15