Finding the Fourth Proportional to 99,802.69, 137,728.04 and 54,481.67

Step by Step Solution

1. Step 1: Write the proportion equation
   99,802.69 : 137,728.04 = 54,481.67 : x
2. Step 2: Convert to fraction form
   99,802.69/137,728.04 = 54,481.67/x
3. Step 3: Cross multiply
   99,802.69x = 137,728.04 × 54,481.67
4. Step 4: Simplify right side
   99,802.69x = 7,503,653,625.03
5. Step 5: Solve for x
   x = 7,503,653,625.03/99,802.69
6. Step 6: Final answer
   x = 75,184.88