Finding the Fourth Proportional to 99,805.18, 137,725.89 and 54,474.37

Step by Step Solution

1. Step 1: Write the proportion equation
   99,805.18 : 137,725.89 = 54,474.37 : x
2. Step 2: Convert to fraction form
   99,805.18/137,725.89 = 54,474.37/x
3. Step 3: Cross multiply
   99,805.18x = 137,725.89 × 54,474.37
4. Step 4: Simplify right side
   99,805.18x = 7,502,531,090.44
5. Step 5: Solve for x
   x = 7,502,531,090.44/99,805.18
6. Step 6: Final answer
   x = 75,171.76