Finding the Fourth Proportional to 9,916.93, 13,673.41 and 8,570.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,916.93 : 13,673.41 = 8,570.10 : x
2. Step 2: Convert to fraction form
   9,916.93/13,673.41 = 8,570.10/x
3. Step 3: Cross multiply
   9,916.93x = 13,673.41 × 8,570.10
4. Step 4: Simplify right side
   9,916.93x = 117,182,520.89
5. Step 5: Solve for x
   x = 117,182,520.89/9,916.93
6. Step 6: Final answer
   x = 11,816.41