Finding the Fourth Proportional to 99,481.72, 149,128.78 and 49,514.58

Step by Step Solution

1. Step 1: Write the proportion equation
   99,481.72 : 149,128.78 = 49,514.58 : x
2. Step 2: Convert to fraction form
   99,481.72/149,128.78 = 49,514.58/x
3. Step 3: Cross multiply
   99,481.72x = 149,128.78 × 49,514.58
4. Step 4: Simplify right side
   99,481.72x = 7,384,048,783.83
5. Step 5: Solve for x
   x = 7,384,048,783.83/99,481.72
6. Step 6: Final answer
   x = 74,225.18