Finding the Fourth Proportional to 10,602.80, 15,900.15 and 3,485.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,602.80 : 15,900.15 = 3,485.38 : x
2. Step 2: Convert to fraction form
   10,602.80/15,900.15 = 3,485.38/x
3. Step 3: Cross multiply
   10,602.80x = 15,900.15 × 3,485.38
4. Step 4: Simplify right side
   10,602.80x = 55,418,048.33
5. Step 5: Solve for x
   x = 55,418,048.33/10,602.80
6. Step 6: Final answer
   x = 5,226.74