Finding the Fourth Proportional to 12,312.69, 18,441.50 and 5,729.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,312.69 : 18,441.50 = 5,729.01 : x
2. Step 2: Convert to fraction form
   12,312.69/18,441.50 = 5,729.01/x
3. Step 3: Cross multiply
   12,312.69x = 18,441.50 × 5,729.01
4. Step 4: Simplify right side
   12,312.69x = 105,651,509.27
5. Step 5: Solve for x
   x = 105,651,509.27/12,312.69
6. Step 6: Final answer
   x = 8,580.70