Finding the Fourth Proportional to 11,781.79, 16,271.55 and 7,316.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,781.79 : 16,271.55 = 7,316.15 : x
2. Step 2: Convert to fraction form
   11,781.79/16,271.55 = 7,316.15/x
3. Step 3: Cross multiply
   11,781.79x = 16,271.55 × 7,316.15
4. Step 4: Simplify right side
   11,781.79x = 119,045,019.17
5. Step 5: Solve for x
   x = 119,045,019.17/11,781.79
6. Step 6: Final answer
   x = 10,104.16