Finding the Fourth Proportional to 59,605.98, 89,433.45 and 28,421.34

Step by Step Solution

1. Step 1: Write the proportion equation
   59,605.98 : 89,433.45 = 28,421.34 : x
2. Step 2: Convert to fraction form
   59,605.98/89,433.45 = 28,421.34/x
3. Step 3: Cross multiply
   59,605.98x = 89,433.45 × 28,421.34
4. Step 4: Simplify right side
   59,605.98x = 2,541,818,489.82
5. Step 5: Solve for x
   x = 2,541,818,489.82/59,605.98
6. Step 6: Final answer
   x = 42,643.68