Finding the Fourth Proportional to 281,300.16, 421,904.76 and 103,890.72

Step by Step Solution

1. Step 1: Write the proportion equation
   281,300.16 : 421,904.76 = 103,890.72 : x
2. Step 2: Convert to fraction form
   281,300.16/421,904.76 = 103,890.72/x
3. Step 3: Cross multiply
   281,300.16x = 421,904.76 × 103,890.72
4. Step 4: Simplify right side
   281,300.16x = 43,831,990,732.18
5. Step 5: Solve for x
   x = 43,831,990,732.18/281,300.16
6. Step 6: Final answer
   x = 155,819.29