Finding the Fourth Proportional to 42,665.50, 63,999.17 and 13,082.68

Step by Step Solution

1. Step 1: Write the proportion equation
   42,665.50 : 63,999.17 = 13,082.68 : x
2. Step 2: Convert to fraction form
   42,665.50/63,999.17 = 13,082.68/x
3. Step 3: Cross multiply
   42,665.50x = 63,999.17 × 13,082.68
4. Step 4: Simplify right side
   42,665.50x = 837,280,485.02
5. Step 5: Solve for x
   x = 837,280,485.02/42,665.50
6. Step 6: Final answer
   x = 19,624.30