Finding the Fourth Proportional to 81,396.78, 112,336.83 and 49,584.30

Step by Step Solution

1. Step 1: Write the proportion equation
   81,396.78 : 112,336.83 = 49,584.30 : x
2. Step 2: Convert to fraction form
   81,396.78/112,336.83 = 49,584.30/x
3. Step 3: Cross multiply
   81,396.78x = 112,336.83 × 49,584.30
4. Step 4: Simplify right side
   81,396.78x = 5,570,143,079.77
5. Step 5: Solve for x
   x = 5,570,143,079.77/81,396.78
6. Step 6: Final answer
   x = 68,431.98