Finding the Fourth Proportional to 12,315.64, 18,460.56 and 5,736.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,315.64 : 18,460.56 = 5,736.40 : x
2. Step 2: Convert to fraction form
   12,315.64/18,460.56 = 5,736.40/x
3. Step 3: Cross multiply
   12,315.64x = 18,460.56 × 5,736.40
4. Step 4: Simplify right side
   12,315.64x = 105,897,156.38
5. Step 5: Solve for x
   x = 105,897,156.38/12,315.64
6. Step 6: Final answer
   x = 8,598.59