Finding the Fourth Proportional to 42,731.69, 64,120.48 and 17,788.95

Step by Step Solution

1. Step 1: Write the proportion equation
   42,731.69 : 64,120.48 = 17,788.95 : x
2. Step 2: Convert to fraction form
   42,731.69/64,120.48 = 17,788.95/x
3. Step 3: Cross multiply
   42,731.69x = 64,120.48 × 17,788.95
4. Step 4: Simplify right side
   42,731.69x = 1,140,635,968.22
5. Step 5: Solve for x
   x = 1,140,635,968.22/42,731.69
6. Step 6: Final answer
   x = 26,692.98