Finding the Fourth Proportional to 72,972.81, 109,405.82 and 49,221.25

Step by Step Solution

1. Step 1: Write the proportion equation
   72,972.81 : 109,405.82 = 49,221.25 : x
2. Step 2: Convert to fraction form
   72,972.81/109,405.82 = 49,221.25/x
3. Step 3: Cross multiply
   72,972.81x = 109,405.82 × 49,221.25
4. Step 4: Simplify right side
   72,972.81x = 5,385,091,067.21
5. Step 5: Solve for x
   x = 5,385,091,067.21/72,972.81
6. Step 6: Final answer
   x = 73,795.86