Finding the Fourth Proportional to 31,575.54, 43,590 and 19,642.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,575.54 : 43,590 = 19,642.72 : x
2. Step 2: Convert to fraction form
   31,575.54/43,590 = 19,642.72/x
3. Step 3: Cross multiply
   31,575.54x = 43,590 × 19,642.72
4. Step 4: Simplify right side
   31,575.54x = 856,226,164.80
5. Step 5: Solve for x
   x = 856,226,164.80/31,575.54
6. Step 6: Final answer
   x = 27,116.75