Finding the Fourth Proportional to 271,224, 406,836 and 105,012

Step by Step Solution

1. Step 1: Write the proportion equation
   271,224 : 406,836 = 105,012 : x
2. Step 2: Convert to fraction form
   271,224/406,836 = 105,012/x
3. Step 3: Cross multiply
   271,224x = 406,836 × 105,012
4. Step 4: Simplify right side
   271,224x = 42,722,662,032
5. Step 5: Solve for x
   x = 42,722,662,032/271,224
6. Step 6: Final answer
   x = 157,518