Finding the Fourth Proportional to 10,530.38, 15,790.28 and 3,507.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,530.38 : 15,790.28 = 3,507.91 : x
2. Step 2: Convert to fraction form
   10,530.38/15,790.28 = 3,507.91/x
3. Step 3: Cross multiply
   10,530.38x = 15,790.28 × 3,507.91
4. Step 4: Simplify right side
   10,530.38x = 55,390,824.10
5. Step 5: Solve for x
   x = 55,390,824.10/10,530.38
6. Step 6: Final answer
   x = 5,260.10