Finding the Fourth Proportional to 12,199.53, 18,300.54 and 3,315

Step by Step Solution

1. Step 1: Write the proportion equation
   12,199.53 : 18,300.54 = 3,315 : x
2. Step 2: Convert to fraction form
   12,199.53/18,300.54 = 3,315/x
3. Step 3: Cross multiply
   12,199.53x = 18,300.54 × 3,315
4. Step 4: Simplify right side
   12,199.53x = 60,666,290.10
5. Step 5: Solve for x
   x = 60,666,290.10/12,199.53
6. Step 6: Final answer
   x = 4,972.84