Finding the Fourth Proportional to 281,049.75, 421,647.53 and 101,128.91

Step by Step Solution

1. Step 1: Write the proportion equation
   281,049.75 : 421,647.53 = 101,128.91 : x
2. Step 2: Convert to fraction form
   281,049.75/421,647.53 = 101,128.91/x
3. Step 3: Cross multiply
   281,049.75x = 421,647.53 × 101,128.91
4. Step 4: Simplify right side
   281,049.75x = 42,640,752,499.21
5. Step 5: Solve for x
   x = 42,640,752,499.21/281,049.75
6. Step 6: Final answer
   x = 151,719.59