Finding the Fourth Proportional to 23,991.10, 33,111.25 and 15,513.06

Step by Step Solution

1. Step 1: Write the proportion equation
   23,991.10 : 33,111.25 = 15,513.06 : x
2. Step 2: Convert to fraction form
   23,991.10/33,111.25 = 15,513.06/x
3. Step 3: Cross multiply
   23,991.10x = 33,111.25 × 15,513.06
4. Step 4: Simplify right side
   23,991.10x = 513,656,893.31
5. Step 5: Solve for x
   x = 513,656,893.31/23,991.10
6. Step 6: Final answer
   x = 21,410.31