Finding the Fourth Proportional to 81,606.65, 122,311.51 and 42,142.19

Step by Step Solution

1. Step 1: Write the proportion equation
   81,606.65 : 122,311.51 = 42,142.19 : x
2. Step 2: Convert to fraction form
   81,606.65/122,311.51 = 42,142.19/x
3. Step 3: Cross multiply
   81,606.65x = 122,311.51 × 42,142.19
4. Step 4: Simplify right side
   81,606.65x = 5,154,474,176.69
5. Step 5: Solve for x
   x = 5,154,474,176.69/81,606.65
6. Step 6: Final answer
   x = 63,162.43