Finding the Fourth Proportional to 10,509.52, 15,764.72 and 3,490.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,509.52 : 15,764.72 = 3,490.15 : x
2. Step 2: Convert to fraction form
   10,509.52/15,764.72 = 3,490.15/x
3. Step 3: Cross multiply
   10,509.52x = 15,764.72 × 3,490.15
4. Step 4: Simplify right side
   10,509.52x = 55,021,237.51
5. Step 5: Solve for x
   x = 55,021,237.51/10,509.52
6. Step 6: Final answer
   x = 5,235.37