Finding the Fourth Proportional to 12,499.10, 18,727.05 and 8,114.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,499.10 : 18,727.05 = 8,114.30 : x
2. Step 2: Convert to fraction form
   12,499.10/18,727.05 = 8,114.30/x
3. Step 3: Cross multiply
   12,499.10x = 18,727.05 × 8,114.30
4. Step 4: Simplify right side
   12,499.10x = 151,956,901.82
5. Step 5: Solve for x
   x = 151,956,901.82/12,499.10
6. Step 6: Final answer
   x = 12,157.43