Finding the Fourth Proportional to 11,381.79, 17,061.42 and 5,451.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,381.79 : 17,061.42 = 5,451.81 : x
2. Step 2: Convert to fraction form
   11,381.79/17,061.42 = 5,451.81/x
3. Step 3: Cross multiply
   11,381.79x = 17,061.42 × 5,451.81
4. Step 4: Simplify right side
   11,381.79x = 93,015,620.17
5. Step 5: Solve for x
   x = 93,015,620.17/11,381.79
6. Step 6: Final answer
   x = 8,172.32