Finding the Fourth Proportional to 99,809.84, 137,735.52 and 54,488.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,809.84 : 137,735.52 = 54,488.72 : x
2. Step 2: Convert to fraction form
   99,809.84/137,735.52 = 54,488.72/x
3. Step 3: Cross multiply
   99,809.84x = 137,735.52 × 54,488.72
4. Step 4: Simplify right side
   99,809.84x = 7,505,032,183.33
5. Step 5: Solve for x
   x = 7,505,032,183.33/99,809.84
6. Step 6: Final answer
   x = 75,193.31