Finding the Fourth Proportional to 42,958.98, 64,457.60 and 16,665.77

Step by Step Solution

1. Step 1: Write the proportion equation
   42,958.98 : 64,457.60 = 16,665.77 : x
2. Step 2: Convert to fraction form
   42,958.98/64,457.60 = 16,665.77/x
3. Step 3: Cross multiply
   42,958.98x = 64,457.60 × 16,665.77
4. Step 4: Simplify right side
   42,958.98x = 1,074,235,130.74
5. Step 5: Solve for x
   x = 1,074,235,130.74/42,958.98
6. Step 6: Final answer
   x = 25,006.07