Finding the Fourth Proportional to 139,897.24, 209,907.78 and 73,321.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,897.24 : 209,907.78 = 73,321.42 : x
2. Step 2: Convert to fraction form
   139,897.24/209,907.78 = 73,321.42/x
3. Step 3: Cross multiply
   139,897.24x = 209,907.78 × 73,321.42
4. Step 4: Simplify right side
   139,897.24x = 15,390,736,498.65
5. Step 5: Solve for x
   x = 15,390,736,498.65/139,897.24
6. Step 6: Final answer
   x = 110,014.58