Finding the Fourth Proportional to 13,440.30, 18,547.83 and 7,472.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,440.30 : 18,547.83 = 7,472.04 : x
2. Step 2: Convert to fraction form
   13,440.30/18,547.83 = 7,472.04/x
3. Step 3: Cross multiply
   13,440.30x = 18,547.83 × 7,472.04
4. Step 4: Simplify right side
   13,440.30x = 138,590,127.67
5. Step 5: Solve for x
   x = 138,590,127.67/13,440.30
6. Step 6: Final answer
   x = 10,311.54