Finding the Fourth Proportional to 139,892.21, 209,900.28 and 73,316.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,892.21 : 209,900.28 = 73,316.42 : x
2. Step 2: Convert to fraction form
   139,892.21/209,900.28 = 73,316.42/x
3. Step 3: Cross multiply
   139,892.21x = 209,900.28 × 73,316.42
4. Step 4: Simplify right side
   139,892.21x = 15,389,137,086.60
5. Step 5: Solve for x
   x = 15,389,137,086.60/139,892.21
6. Step 6: Final answer
   x = 110,007.11