Finding the Fourth Proportional to 31,047.42, 46,565.59 and 13,288.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,047.42 : 46,565.59 = 13,288.06 : x
2. Step 2: Convert to fraction form
   31,047.42/46,565.59 = 13,288.06/x
3. Step 3: Cross multiply
   31,047.42x = 46,565.59 × 13,288.06
4. Step 4: Simplify right side
   31,047.42x = 618,766,353.86
5. Step 5: Solve for x
   x = 618,766,353.86/31,047.42
6. Step 6: Final answer
   x = 19,929.72