Finding the Fourth Proportional to 31,499.72, 47,235.42 and 9,305.36

Step by Step Solution

1. Step 1: Write the proportion equation
   31,499.72 : 47,235.42 = 9,305.36 : x
2. Step 2: Convert to fraction form
   31,499.72/47,235.42 = 9,305.36/x
3. Step 3: Cross multiply
   31,499.72x = 47,235.42 × 9,305.36
4. Step 4: Simplify right side
   31,499.72x = 439,542,587.85
5. Step 5: Solve for x
   x = 439,542,587.85/31,499.72
6. Step 6: Final answer
   x = 13,953.86