Finding the Fourth Proportional to 42,478.04, 58,622.58 and 28,113.09

Step by Step Solution

1. Step 1: Write the proportion equation
   42,478.04 : 58,622.58 = 28,113.09 : x
2. Step 2: Convert to fraction form
   42,478.04/58,622.58 = 28,113.09/x
3. Step 3: Cross multiply
   42,478.04x = 58,622.58 × 28,113.09
4. Step 4: Simplify right side
   42,478.04x = 1,648,061,867.57
5. Step 5: Solve for x
   x = 1,648,061,867.57/42,478.04
6. Step 6: Final answer
   x = 38,797.97