Finding the Fourth Proportional to 31,565.72, 47,345.34 and 19,843.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,565.72 : 47,345.34 = 19,843.40 : x
2. Step 2: Convert to fraction form
   31,565.72/47,345.34 = 19,843.40/x
3. Step 3: Cross multiply
   31,565.72x = 47,345.34 × 19,843.40
4. Step 4: Simplify right side
   31,565.72x = 939,492,519.76
5. Step 5: Solve for x
   x = 939,492,519.76/31,565.72
6. Step 6: Final answer
   x = 29,763.06