Finding the Fourth Proportional to 42,485.81, 58,608.83 and 28,314.05

Step by Step Solution

1. Step 1: Write the proportion equation
   42,485.81 : 58,608.83 = 28,314.05 : x
2. Step 2: Convert to fraction form
   42,485.81/58,608.83 = 28,314.05/x
3. Step 3: Cross multiply
   42,485.81x = 58,608.83 × 28,314.05
4. Step 4: Simplify right side
   42,485.81x = 1,659,453,120.80
5. Step 5: Solve for x
   x = 1,659,453,120.80/42,485.81
6. Step 6: Final answer
   x = 39,059.00