Finding the Fourth Proportional to 10,272.61, 14,172.89 and 8,112.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,272.61 : 14,172.89 = 8,112.30 : x
2. Step 2: Convert to fraction form
   10,272.61/14,172.89 = 8,112.30/x
3. Step 3: Cross multiply
   10,272.61x = 14,172.89 × 8,112.30
4. Step 4: Simplify right side
   10,272.61x = 114,974,641.84
5. Step 5: Solve for x
   x = 114,974,641.84/10,272.61
6. Step 6: Final answer
   x = 11,192.35