Finding the Fourth Proportional to 99,946.72, 137,922.18 and 54,623.98

Step by Step Solution

1. Step 1: Write the proportion equation
   99,946.72 : 137,922.18 = 54,623.98 : x
2. Step 2: Convert to fraction form
   99,946.72/137,922.18 = 54,623.98/x
3. Step 3: Cross multiply
   99,946.72x = 137,922.18 × 54,623.98
4. Step 4: Simplify right side
   99,946.72x = 7,533,858,401.88
5. Step 5: Solve for x
   x = 7,533,858,401.88/99,946.72
6. Step 6: Final answer
   x = 75,378.75