Finding the Fourth Proportional to 23,076, 31,845.60 and 13,140

Step by Step Solution

1. Step 1: Write the proportion equation
   23,076 : 31,845.60 = 13,140 : x
2. Step 2: Convert to fraction form
   23,076/31,845.60 = 13,140/x
3. Step 3: Cross multiply
   23,076x = 31,845.60 × 13,140
4. Step 4: Simplify right side
   23,076x = 418,451,184
5. Step 5: Solve for x
   x = 418,451,184/23,076
6. Step 6: Final answer
   x = 18,133.61