Finding the Fourth Proportional to 281,516.16, 388,492.32 and 154,196.31

Step by Step Solution

1. Step 1: Write the proportion equation
   281,516.16 : 388,492.32 = 154,196.31 : x
2. Step 2: Convert to fraction form
   281,516.16/388,492.32 = 154,196.31/x
3. Step 3: Cross multiply
   281,516.16x = 388,492.32 × 154,196.31
4. Step 4: Simplify right side
   281,516.16x = 59,904,082,207.34
5. Step 5: Solve for x
   x = 59,904,082,207.34/281,516.16
6. Step 6: Final answer
   x = 212,790.92