Finding the Fourth Proportional to 10,109.30, 13,945.41 and 6,129.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,109.30 : 13,945.41 = 6,129.56 : x
2. Step 2: Convert to fraction form
   10,109.30/13,945.41 = 6,129.56/x
3. Step 3: Cross multiply
   10,109.30x = 13,945.41 × 6,129.56
4. Step 4: Simplify right side
   10,109.30x = 85,479,157.59
5. Step 5: Solve for x
   x = 85,479,157.59/10,109.30
6. Step 6: Final answer
   x = 8,455.50