Finding the Fourth Proportional to 80,915.84, 111,618.12 and 50,648.61

Step by Step Solution

1. Step 1: Write the proportion equation
   80,915.84 : 111,618.12 = 50,648.61 : x
2. Step 2: Convert to fraction form
   80,915.84/111,618.12 = 50,648.61/x
3. Step 3: Cross multiply
   80,915.84x = 111,618.12 × 50,648.61
4. Step 4: Simplify right side
   80,915.84x = 5,653,302,628.81
5. Step 5: Solve for x
   x = 5,653,302,628.81/80,915.84
6. Step 6: Final answer
   x = 69,866.46