Finding the Fourth Proportional to 64,909.05, 89,503.88 and 42,205.94

Step by Step Solution

1. Step 1: Write the proportion equation
   64,909.05 : 89,503.88 = 42,205.94 : x
2. Step 2: Convert to fraction form
   64,909.05/89,503.88 = 42,205.94/x
3. Step 3: Cross multiply
   64,909.05x = 89,503.88 × 42,205.94
4. Step 4: Simplify right side
   64,909.05x = 3,777,595,389.05
5. Step 5: Solve for x
   x = 3,777,595,389.05/64,909.05
6. Step 6: Final answer
   x = 58,198.28