Finding the Fourth Proportional to 57,630.98, 79,528.30 and 42,518.21

Step by Step Solution

1. Step 1: Write the proportion equation
   57,630.98 : 79,528.30 = 42,518.21 : x
2. Step 2: Convert to fraction form
   57,630.98/79,528.30 = 42,518.21/x
3. Step 3: Cross multiply
   57,630.98x = 79,528.30 × 42,518.21
4. Step 4: Simplify right side
   57,630.98x = 3,381,400,456.41
5. Step 5: Solve for x
   x = 3,381,400,456.41/57,630.98
6. Step 6: Final answer
   x = 58,673.31