Finding the Fourth Proportional to 42,103.90, 58,072.98 and 28,651.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42,103.90 : 58,072.98 = 28,651.42 : x
2. Step 2: Convert to fraction form
   42,103.90/58,072.98 = 28,651.42/x
3. Step 3: Cross multiply
   42,103.90x = 58,072.98 × 28,651.42
4. Step 4: Simplify right side
   42,103.90x = 1,663,873,340.63
5. Step 5: Solve for x
   x = 1,663,873,340.63/42,103.90
6. Step 6: Final answer
   x = 39,518.27