Finding the Fourth Proportional to 82,198.72, 123,111.20 and 64,317.96

Step by Step Solution

1. Step 1: Write the proportion equation
   82,198.72 : 123,111.20 = 64,317.96 : x
2. Step 2: Convert to fraction form
   82,198.72/123,111.20 = 64,317.96/x
3. Step 3: Cross multiply
   82,198.72x = 123,111.20 × 64,317.96
4. Step 4: Simplify right side
   82,198.72x = 7,918,261,237.15
5. Step 5: Solve for x
   x = 7,918,261,237.15/82,198.72
6. Step 6: Final answer
   x = 96,330.71