Finding the Fourth Proportional to 31,002.75, 42,794.73 and 18,427.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,002.75 : 42,794.73 = 18,427.50 : x
2. Step 2: Convert to fraction form
   31,002.75/42,794.73 = 18,427.50/x
3. Step 3: Cross multiply
   31,002.75x = 42,794.73 × 18,427.50
4. Step 4: Simplify right side
   31,002.75x = 788,599,887.08
5. Step 5: Solve for x
   x = 788,599,887.08/31,002.75
6. Step 6: Final answer
   x = 25,436.45