Finding the Fourth Proportional to 162,105.90, 243,013.05 and 102,911.10

Step by Step Solution

1. Step 1: Write the proportion equation
   162,105.90 : 243,013.05 = 102,911.10 : x
2. Step 2: Convert to fraction form
   162,105.90/243,013.05 = 102,911.10/x
3. Step 3: Cross multiply
   162,105.90x = 243,013.05 × 102,911.10
4. Step 4: Simplify right side
   162,105.90x = 25,008,740,289.86
5. Step 5: Solve for x
   x = 25,008,740,289.86/162,105.90
6. Step 6: Final answer
   x = 154,274.09