Finding the Fourth Proportional to 9,359.98, 12,916.80 and 5,111.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,359.98 : 12,916.80 = 5,111.09 : x
2. Step 2: Convert to fraction form
   9,359.98/12,916.80 = 5,111.09/x
3. Step 3: Cross multiply
   9,359.98x = 12,916.80 × 5,111.09
4. Step 4: Simplify right side
   9,359.98x = 66,018,914.56
5. Step 5: Solve for x
   x = 66,018,914.56/9,359.98
6. Step 6: Final answer
   x = 7,053.32