Finding the Fourth Proportional to 22,515.97, 31,075.89 and 13,090

Step by Step Solution

1. Step 1: Write the proportion equation
   22,515.97 : 31,075.89 = 13,090 : x
2. Step 2: Convert to fraction form
   22,515.97/31,075.89 = 13,090/x
3. Step 3: Cross multiply
   22,515.97x = 31,075.89 × 13,090
4. Step 4: Simplify right side
   22,515.97x = 406,783,400.10
5. Step 5: Solve for x
   x = 406,783,400.10/22,515.97
6. Step 6: Final answer
   x = 18,066.44