Finding the Fourth Proportional to 81,801.50, 122,767.86 and 42,369.89

Step by Step Solution

1. Step 1: Write the proportion equation
   81,801.50 : 122,767.86 = 42,369.89 : x
2. Step 2: Convert to fraction form
   81,801.50/122,767.86 = 42,369.89/x
3. Step 3: Cross multiply
   81,801.50x = 122,767.86 × 42,369.89
4. Step 4: Simplify right side
   81,801.50x = 5,201,660,109.90
5. Step 5: Solve for x
   x = 5,201,660,109.90/81,801.50
6. Step 6: Final answer
   x = 63,588.81