Finding the Fourth Proportional to 42,072.01, 58,028.91 and 28,619.33

Step by Step Solution

1. Step 1: Write the proportion equation
   42,072.01 : 58,028.91 = 28,619.33 : x
2. Step 2: Convert to fraction form
   42,072.01/58,028.91 = 28,619.33/x
3. Step 3: Cross multiply
   42,072.01x = 58,028.91 × 28,619.33
4. Step 4: Simplify right side
   42,072.01x = 1,660,748,127.36
5. Step 5: Solve for x
   x = 1,660,748,127.36/42,072.01
6. Step 6: Final answer
   x = 39,473.95