Finding the Fourth Proportional to 65,456.84, 90,329.86 and 39,957.84

Step by Step Solution

1. Step 1: Write the proportion equation
   65,456.84 : 90,329.86 = 39,957.84 : x
2. Step 2: Convert to fraction form
   65,456.84/90,329.86 = 39,957.84/x
3. Step 3: Cross multiply
   65,456.84x = 90,329.86 × 39,957.84
4. Step 4: Simplify right side
   65,456.84x = 3,609,386,093.10
5. Step 5: Solve for x
   x = 3,609,386,093.10/65,456.84
6. Step 6: Final answer
   x = 55,141.47