Finding the Fourth Proportional to 42,192.82, 58,273.89 and 28,740.70

Step by Step Solution

1. Step 1: Write the proportion equation
   42,192.82 : 58,273.89 = 28,740.70 : x
2. Step 2: Convert to fraction form
   42,192.82/58,273.89 = 28,740.70/x
3. Step 3: Cross multiply
   42,192.82x = 58,273.89 × 28,740.70
4. Step 4: Simplify right side
   42,192.82x = 1,674,832,390.32
5. Step 5: Solve for x
   x = 1,674,832,390.32/42,192.82
6. Step 6: Final answer
   x = 39,694.73