Finding the Fourth Proportional to 59,769.81, 89,633.79 and 17,638.71

Step by Step Solution

1. Step 1: Write the proportion equation
   59,769.81 : 89,633.79 = 17,638.71 : x
2. Step 2: Convert to fraction form
   59,769.81/89,633.79 = 17,638.71/x
3. Step 3: Cross multiply
   59,769.81x = 89,633.79 × 17,638.71
4. Step 4: Simplify right side
   59,769.81x = 1,581,024,428.01
5. Step 5: Solve for x
   x = 1,581,024,428.01/59,769.81
6. Step 6: Final answer
   x = 26,451.89