Finding the Fourth Proportional to 12,762.50, 17,612.25 and 7,173.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,762.50 : 17,612.25 = 7,173.50 : x
2. Step 2: Convert to fraction form
   12,762.50/17,612.25 = 7,173.50/x
3. Step 3: Cross multiply
   12,762.50x = 17,612.25 × 7,173.50
4. Step 4: Simplify right side
   12,762.50x = 126,341,475.38
5. Step 5: Solve for x
   x = 126,341,475.38/12,762.50
6. Step 6: Final answer
   x = 9,899.43