Finding the Fourth Proportional to 12,380.02, 17,091.83 and 8,138.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.02 : 17,091.83 = 8,138.18 : x
2. Step 2: Convert to fraction form
   12,380.02/17,091.83 = 8,138.18/x
3. Step 3: Cross multiply
   12,380.02x = 17,091.83 × 8,138.18
4. Step 4: Simplify right side
   12,380.02x = 139,096,389.07
5. Step 5: Solve for x
   x = 139,096,389.07/12,380.02
6. Step 6: Final answer
   x = 11,235.55