Finding the Fourth Proportional to 82,409.37, 123,540.23 and 42,921.26

Step by Step Solution

1. Step 1: Write the proportion equation
   82,409.37 : 123,540.23 = 42,921.26 : x
2. Step 2: Convert to fraction form
   82,409.37/123,540.23 = 42,921.26/x
3. Step 3: Cross multiply
   82,409.37x = 123,540.23 × 42,921.26
4. Step 4: Simplify right side
   82,409.37x = 5,302,501,714.59
5. Step 5: Solve for x
   x = 5,302,501,714.59/82,409.37
6. Step 6: Final answer
   x = 64,343.44