Finding the Fourth Proportional to 81,801.42, 122,767.76 and 42,369.81

Step by Step Solution

1. Step 1: Write the proportion equation
   81,801.42 : 122,767.76 = 42,369.81 : x
2. Step 2: Convert to fraction form
   81,801.42/122,767.76 = 42,369.81/x
3. Step 3: Cross multiply
   81,801.42x = 122,767.76 × 42,369.81
4. Step 4: Simplify right side
   81,801.42x = 5,201,647,072.74
5. Step 5: Solve for x
   x = 5,201,647,072.74/81,801.42
6. Step 6: Final answer
   x = 63,588.71