Finding the Fourth Proportional to 10,221, 15,242.05 and 10,127.58

Step by Step Solution

1. Step 1: Write the proportion equation
   10,221 : 15,242.05 = 10,127.58 : x
2. Step 2: Convert to fraction form
   10,221/15,242.05 = 10,127.58/x
3. Step 3: Cross multiply
   10,221x = 15,242.05 × 10,127.58
4. Step 4: Simplify right side
   10,221x = 154,365,055.42
5. Step 5: Solve for x
   x = 154,365,055.42/10,221
6. Step 6: Final answer
   x = 15,102.74