Finding the Fourth Proportional to 139,069.44, 191,947.59 and 81,715.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,069.44 : 191,947.59 = 81,715.50 : x
2. Step 2: Convert to fraction form
   139,069.44/191,947.59 = 81,715.50/x
3. Step 3: Cross multiply
   139,069.44x = 191,947.59 × 81,715.50
4. Step 4: Simplify right side
   139,069.44x = 15,685,093,290.65
5. Step 5: Solve for x
   x = 15,685,093,290.65/139,069.44
6. Step 6: Final answer
   x = 112,786.05