Finding the Fourth Proportional to 10,529.75, 15,789.34 and 3,507.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,529.75 : 15,789.34 = 3,507.30 : x
2. Step 2: Convert to fraction form
   10,529.75/15,789.34 = 3,507.30/x
3. Step 3: Cross multiply
   10,529.75x = 15,789.34 × 3,507.30
4. Step 4: Simplify right side
   10,529.75x = 55,377,952.18
5. Step 5: Solve for x
   x = 55,377,952.18/10,529.75
6. Step 6: Final answer
   x = 5,259.19