Finding the Fourth Proportional to 42,687.48, 58,838.22 and 28,535.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,687.48 : 58,838.22 = 28,535.16 : x
2. Step 2: Convert to fraction form
   42,687.48/58,838.22 = 28,535.16/x
3. Step 3: Cross multiply
   42,687.48x = 58,838.22 × 28,535.16
4. Step 4: Simplify right side
   42,687.48x = 1,678,958,021.82
5. Step 5: Solve for x
   x = 1,678,958,021.82/42,687.48
6. Step 6: Final answer
   x = 39,331.39