Finding the Fourth Proportional to 42,123.82, 58,042.26 and 28,671.34

Step by Step Solution

1. Step 1: Write the proportion equation
   42,123.82 : 58,042.26 = 28,671.34 : x
2. Step 2: Convert to fraction form
   42,123.82/58,042.26 = 28,671.34/x
3. Step 3: Cross multiply
   42,123.82x = 58,042.26 × 28,671.34
4. Step 4: Simplify right side
   42,123.82x = 1,664,149,370.83
5. Step 5: Solve for x
   x = 1,664,149,370.83/42,123.82
6. Step 6: Final answer
   x = 39,506.14