Finding the Fourth Proportional to 139,879.80, 209,881.71 and 73,304.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,879.80 : 209,881.71 = 73,304.10 : x
2. Step 2: Convert to fraction form
   139,879.80/209,881.71 = 73,304.10/x
3. Step 3: Cross multiply
   139,879.80x = 209,881.71 × 73,304.10
4. Step 4: Simplify right side
   139,879.80x = 15,385,189,858.01
5. Step 5: Solve for x
   x = 15,385,189,858.01/139,879.80
6. Step 6: Final answer
   x = 109,988.65