Finding the Fourth Proportional to 42,270.58, 58,290.78 and 30,941.92

Step by Step Solution

1. Step 1: Write the proportion equation
   42,270.58 : 58,290.78 = 30,941.92 : x
2. Step 2: Convert to fraction form
   42,270.58/58,290.78 = 30,941.92/x
3. Step 3: Cross multiply
   42,270.58x = 58,290.78 × 30,941.92
4. Step 4: Simplify right side
   42,270.58x = 1,803,628,651.50
5. Step 5: Solve for x
   x = 1,803,628,651.50/42,270.58
6. Step 6: Final answer
   x = 42,668.65