Finding the Fourth Proportional to 139,352.50, 209,063.47 and 40,856.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,352.50 : 209,063.47 = 40,856.50 : x
2. Step 2: Convert to fraction form
   139,352.50/209,063.47 = 40,856.50/x
3. Step 3: Cross multiply
   139,352.50x = 209,063.47 × 40,856.50
4. Step 4: Simplify right side
   139,352.50x = 8,541,601,662.06
5. Step 5: Solve for x
   x = 8,541,601,662.06/139,352.50
6. Step 6: Final answer
   x = 61,294.93