Finding the Fourth Proportional to 99,803.44, 137,722.89 and 54,472.42

Step by Step Solution

1. Step 1: Write the proportion equation
   99,803.44 : 137,722.89 = 54,472.42 : x
2. Step 2: Convert to fraction form
   99,803.44/137,722.89 = 54,472.42/x
3. Step 3: Cross multiply
   99,803.44x = 137,722.89 × 54,472.42
4. Step 4: Simplify right side
   99,803.44x = 7,502,099,107.69
5. Step 5: Solve for x
   x = 7,502,099,107.69/99,803.44
6. Step 6: Final answer
   x = 75,168.74