Finding the Fourth Proportional to 10,999.37, 16,499.05 and 3,603.87

Step by Step Solution

1. Step 1: Write the proportion equation
   10,999.37 : 16,499.05 = 3,603.87 : x
2. Step 2: Convert to fraction form
   10,999.37/16,499.05 = 3,603.87/x
3. Step 3: Cross multiply
   10,999.37x = 16,499.05 × 3,603.87
4. Step 4: Simplify right side
   10,999.37x = 59,460,431.32
5. Step 5: Solve for x
   x = 59,460,431.32/10,999.37
6. Step 6: Final answer
   x = 5,405.80