Finding the Fourth Proportional to 42,799.50, 64,225.20 and 18,175.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,799.50 : 64,225.20 = 18,175.50 : x
2. Step 2: Convert to fraction form
   42,799.50/64,225.20 = 18,175.50/x
3. Step 3: Cross multiply
   42,799.50x = 64,225.20 × 18,175.50
4. Step 4: Simplify right side
   42,799.50x = 1,167,325,122.60
5. Step 5: Solve for x
   x = 1,167,325,122.60/42,799.50
6. Step 6: Final answer
   x = 27,274.27