Finding the Fourth Proportional to 9,072.18, 13,595.52 and 7,215.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,072.18 : 13,595.52 = 7,215.06 : x
2. Step 2: Convert to fraction form
   9,072.18/13,595.52 = 7,215.06/x
3. Step 3: Cross multiply
   9,072.18x = 13,595.52 × 7,215.06
4. Step 4: Simplify right side
   9,072.18x = 98,092,492.53
5. Step 5: Solve for x
   x = 98,092,492.53/9,072.18
6. Step 6: Final answer
   x = 10,812.45