Finding the Fourth Proportional to 12,101.45, 18,132.69 and 10,157.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,101.45 : 18,132.69 = 10,157.45 : x
2. Step 2: Convert to fraction form
   12,101.45/18,132.69 = 10,157.45/x
3. Step 3: Cross multiply
   12,101.45x = 18,132.69 × 10,157.45
4. Step 4: Simplify right side
   12,101.45x = 184,181,892.04
5. Step 5: Solve for x
   x = 184,181,892.04/12,101.45
6. Step 6: Final answer
   x = 15,219.82