Finding the Fourth Proportional to 10,899.91, 16,348.31 and 3,503.40

Step by Step Solution

1. Step 1: Write the proportion equation
   10,899.91 : 16,348.31 = 3,503.40 : x
2. Step 2: Convert to fraction form
   10,899.91/16,348.31 = 3,503.40/x
3. Step 3: Cross multiply
   10,899.91x = 16,348.31 × 3,503.40
4. Step 4: Simplify right side
   10,899.91x = 57,274,715.23
5. Step 5: Solve for x
   x = 57,274,715.23/10,899.91
6. Step 6: Final answer
   x = 5,254.61