Finding the Fourth Proportional to 10,881.02, 16,294.81 and 5,316.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,881.02 : 16,294.81 = 5,316.42 : x
2. Step 2: Convert to fraction form
   10,881.02/16,294.81 = 5,316.42/x
3. Step 3: Cross multiply
   10,881.02x = 16,294.81 × 5,316.42
4. Step 4: Simplify right side
   10,881.02x = 86,630,053.78
5. Step 5: Solve for x
   x = 86,630,053.78/10,881.02
6. Step 6: Final answer
   x = 7,961.57