Finding the Fourth Proportional to 10,091.21, 15,138.83 and 3,515.63

Step by Step Solution

1. Step 1: Write the proportion equation
   10,091.21 : 15,138.83 = 3,515.63 : x
2. Step 2: Convert to fraction form
   10,091.21/15,138.83 = 3,515.63/x
3. Step 3: Cross multiply
   10,091.21x = 15,138.83 × 3,515.63
4. Step 4: Simplify right side
   10,091.21x = 53,222,458.01
5. Step 5: Solve for x
   x = 53,222,458.01/10,091.21
6. Step 6: Final answer
   x = 5,274.14