Finding the Fourth Proportional to 42,426.68, 58,509.69 and 28,835.07

Step by Step Solution

1. Step 1: Write the proportion equation
   42,426.68 : 58,509.69 = 28,835.07 : x
2. Step 2: Convert to fraction form
   42,426.68/58,509.69 = 28,835.07/x
3. Step 3: Cross multiply
   42,426.68x = 58,509.69 × 28,835.07
4. Step 4: Simplify right side
   42,426.68x = 1,687,131,006.83
5. Step 5: Solve for x
   x = 1,687,131,006.83/42,426.68
6. Step 6: Final answer
   x = 39,765.81