Finding the Fourth Proportional to 81,595.74, 122,295.20 and 42,131.33

Step by Step Solution

1. Step 1: Write the proportion equation
   81,595.74 : 122,295.20 = 42,131.33 : x
2. Step 2: Convert to fraction form
   81,595.74/122,295.20 = 42,131.33/x
3. Step 3: Cross multiply
   81,595.74x = 122,295.20 × 42,131.33
4. Step 4: Simplify right side
   81,595.74x = 5,152,458,606.48
5. Step 5: Solve for x
   x = 5,152,458,606.48/81,595.74
6. Step 6: Final answer
   x = 63,146.17