Finding the Fourth Proportional to 139,458.65, 209,190.30 and 73,028.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,458.65 : 209,190.30 = 73,028.52 : x
2. Step 2: Convert to fraction form
   139,458.65/209,190.30 = 73,028.52/x
3. Step 3: Cross multiply
   139,458.65x = 209,190.30 × 73,028.52
4. Step 4: Simplify right side
   139,458.65x = 15,276,857,733.50
5. Step 5: Solve for x
   x = 15,276,857,733.50/139,458.65
6. Step 6: Final answer
   x = 109,544.00