Finding the Fourth Proportional to 28,443.52, 42,630.69 and 20,125.94

Step by Step Solution

1. Step 1: Write the proportion equation
   28,443.52 : 42,630.69 = 20,125.94 : x
2. Step 2: Convert to fraction form
   28,443.52/42,630.69 = 20,125.94/x
3. Step 3: Cross multiply
   28,443.52x = 42,630.69 × 20,125.94
4. Step 4: Simplify right side
   28,443.52x = 857,982,495.95
5. Step 5: Solve for x
   x = 857,982,495.95/28,443.52
6. Step 6: Final answer
   x = 30,164.43