Finding the Fourth Proportional to 31,003.32, 42,793.74 and 18,436.44

Step by Step Solution

1. Step 1: Write the proportion equation
   31,003.32 : 42,793.74 = 18,436.44 : x
2. Step 2: Convert to fraction form
   31,003.32/42,793.74 = 18,436.44/x
3. Step 3: Cross multiply
   31,003.32x = 42,793.74 × 18,436.44
4. Step 4: Simplify right side
   31,003.32x = 788,964,219.89
5. Step 5: Solve for x
   x = 788,964,219.89/31,003.32
6. Step 6: Final answer
   x = 25,447.73