Finding the Fourth Proportional to 82,537.91, 123,877.56 and 81,916.64

Step by Step Solution

1. Step 1: Write the proportion equation
   82,537.91 : 123,877.56 = 81,916.64 : x
2. Step 2: Convert to fraction form
   82,537.91/123,877.56 = 81,916.64/x
3. Step 3: Cross multiply
   82,537.91x = 123,877.56 × 81,916.64
4. Step 4: Simplify right side
   82,537.91x = 10,147,633,486.60
5. Step 5: Solve for x
   x = 10,147,633,486.60/82,537.91
6. Step 6: Final answer
   x = 122,945.12