Finding the Fourth Proportional to 11,192.50, 15,443.22 and 7,212.70

Step by Step Solution

1. Step 1: Write the proportion equation
   11,192.50 : 15,443.22 = 7,212.70 : x
2. Step 2: Convert to fraction form
   11,192.50/15,443.22 = 7,212.70/x
3. Step 3: Cross multiply
   11,192.50x = 15,443.22 × 7,212.70
4. Step 4: Simplify right side
   11,192.50x = 111,387,312.89
5. Step 5: Solve for x
   x = 111,387,312.89/11,192.50
6. Step 6: Final answer
   x = 9,951.96