Finding the Fourth Proportional to 13,320.65, 19,981.89 and 8,061.53

Step by Step Solution

1. Step 1: Write the proportion equation
   13,320.65 : 19,981.89 = 8,061.53 : x
2. Step 2: Convert to fraction form
   13,320.65/19,981.89 = 8,061.53/x
3. Step 3: Cross multiply
   13,320.65x = 19,981.89 × 8,061.53
4. Step 4: Simplify right side
   13,320.65x = 161,084,605.69
5. Step 5: Solve for x
   x = 161,084,605.69/13,320.65
6. Step 6: Final answer
   x = 12,092.85