Finding the Fourth Proportional to 31,007.58, 42,790.59 and 18,432.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,007.58 : 42,790.59 = 18,432.42 : x
2. Step 2: Convert to fraction form
   31,007.58/42,790.59 = 18,432.42/x
3. Step 3: Cross multiply
   31,007.58x = 42,790.59 × 18,432.42
4. Step 4: Simplify right side
   31,007.58x = 788,734,126.93
5. Step 5: Solve for x
   x = 788,734,126.93/31,007.58
6. Step 6: Final answer
   x = 25,436.82