Finding the Fourth Proportional to 85,428.69, 117,871.64 and 49,597.12

Step by Step Solution

1. Step 1: Write the proportion equation
   85,428.69 : 117,871.64 = 49,597.12 : x
2. Step 2: Convert to fraction form
   85,428.69/117,871.64 = 49,597.12/x
3. Step 3: Cross multiply
   85,428.69x = 117,871.64 × 49,597.12
4. Step 4: Simplify right side
   85,428.69x = 5,846,093,625.69
5. Step 5: Solve for x
   x = 5,846,093,625.69/85,428.69
6. Step 6: Final answer
   x = 68,432.44