Finding the Fourth Proportional to 139,921.80, 209,944.56 and 73,345.98

Step by Step Solution

1. Step 1: Write the proportion equation
   139,921.80 : 209,944.56 = 73,345.98 : x
2. Step 2: Convert to fraction form
   139,921.80/209,944.56 = 73,345.98/x
3. Step 3: Cross multiply
   139,921.80x = 209,944.56 × 73,345.98
4. Step 4: Simplify right side
   139,921.80x = 15,398,589,498.87
5. Step 5: Solve for x
   x = 15,398,589,498.87/139,921.80
6. Step 6: Final answer
   x = 110,051.40