Finding the Fourth Proportional to 281,146.28, 387,978.42 and 153,820.04

Step by Step Solution

1. Step 1: Write the proportion equation
   281,146.28 : 387,978.42 = 153,820.04 : x
2. Step 2: Convert to fraction form
   281,146.28/387,978.42 = 153,820.04/x
3. Step 3: Cross multiply
   281,146.28x = 387,978.42 × 153,820.04
4. Step 4: Simplify right side
   281,146.28x = 59,678,856,083.54
5. Step 5: Solve for x
   x = 59,678,856,083.54/281,146.28
6. Step 6: Final answer
   x = 212,269.77