Finding the Fourth Proportional to 42,172.38, 58,150.41 and 28,751.46

Step by Step Solution

1. Step 1: Write the proportion equation
   42,172.38 : 58,150.41 = 28,751.46 : x
2. Step 2: Convert to fraction form
   42,172.38/58,150.41 = 28,751.46/x
3. Step 3: Cross multiply
   42,172.38x = 58,150.41 × 28,751.46
4. Step 4: Simplify right side
   42,172.38x = 1,671,909,187.10
5. Step 5: Solve for x
   x = 1,671,909,187.10/42,172.38
6. Step 6: Final answer
   x = 39,644.65