Finding the Fourth Proportional to 23,899.16, 32,980.56 and 13,288.55

Step by Step Solution

1. Step 1: Write the proportion equation
   23,899.16 : 32,980.56 = 13,288.55 : x
2. Step 2: Convert to fraction form
   23,899.16/32,980.56 = 13,288.55/x
3. Step 3: Cross multiply
   23,899.16x = 32,980.56 × 13,288.55
4. Step 4: Simplify right side
   23,899.16x = 438,263,820.59
5. Step 5: Solve for x
   x = 438,263,820.59/23,899.16
6. Step 6: Final answer
   x = 18,338.04