Finding the Fourth Proportional to 13,087.89, 18,061.20 and 7,423.74

Step by Step Solution

1. Step 1: Write the proportion equation
   13,087.89 : 18,061.20 = 7,423.74 : x
2. Step 2: Convert to fraction form
   13,087.89/18,061.20 = 7,423.74/x
3. Step 3: Cross multiply
   13,087.89x = 18,061.20 × 7,423.74
4. Step 4: Simplify right side
   13,087.89x = 134,081,652.89
5. Step 5: Solve for x
   x = 134,081,652.89/13,087.89
6. Step 6: Final answer
   x = 10,244.71