Finding the Fourth Proportional to 13,087.87, 18,061.73 and 7,499.95

Step by Step Solution

1. Step 1: Write the proportion equation
   13,087.87 : 18,061.73 = 7,499.95 : x
2. Step 2: Convert to fraction form
   13,087.87/18,061.73 = 7,499.95/x
3. Step 3: Cross multiply
   13,087.87x = 18,061.73 × 7,499.95
4. Step 4: Simplify right side
   13,087.87x = 135,462,071.91
5. Step 5: Solve for x
   x = 135,462,071.91/13,087.87
6. Step 6: Final answer
   x = 10,350.20