Finding the Fourth Proportional to 22,520.05, 31,079.58 and 13,088

Step by Step Solution

1. Step 1: Write the proportion equation
   22,520.05 : 31,079.58 = 13,088 : x
2. Step 2: Convert to fraction form
   22,520.05/31,079.58 = 13,088/x
3. Step 3: Cross multiply
   22,520.05x = 31,079.58 × 13,088
4. Step 4: Simplify right side
   22,520.05x = 406,769,543.04
5. Step 5: Solve for x
   x = 406,769,543.04/22,520.05
6. Step 6: Final answer
   x = 18,062.55