Finding the Fourth Proportional to 23,130, 31,919.40 and 13,194

Step by Step Solution

1. Step 1: Write the proportion equation
   23,130 : 31,919.40 = 13,194 : x
2. Step 2: Convert to fraction form
   23,130/31,919.40 = 13,194/x
3. Step 3: Cross multiply
   23,130x = 31,919.40 × 13,194
4. Step 4: Simplify right side
   23,130x = 421,144,563.60
5. Step 5: Solve for x
   x = 421,144,563.60/23,130
6. Step 6: Final answer
   x = 18,207.72