Finding the Fourth Proportional to 281,359.78, 422,081.39 and 81,681.82

Step by Step Solution

1. Step 1: Write the proportion equation
   281,359.78 : 422,081.39 = 81,681.82 : x
2. Step 2: Convert to fraction form
   281,359.78/422,081.39 = 81,681.82/x
3. Step 3: Cross multiply
   281,359.78x = 422,081.39 × 81,681.82
4. Step 4: Simplify right side
   281,359.78x = 34,476,376,123.33
5. Step 5: Solve for x
   x = 34,476,376,123.33/281,359.78
6. Step 6: Final answer
   x = 122,534.84