Finding the Fourth Proportional to 42,971.04, 64,481.58 and 18,009

Step by Step Solution

1. Step 1: Write the proportion equation
   42,971.04 : 64,481.58 = 18,009 : x
2. Step 2: Convert to fraction form
   42,971.04/64,481.58 = 18,009/x
3. Step 3: Cross multiply
   42,971.04x = 64,481.58 × 18,009
4. Step 4: Simplify right side
   42,971.04x = 1,161,248,774.22
5. Step 5: Solve for x
   x = 1,161,248,774.22/42,971.04
6. Step 6: Final answer
   x = 27,023.99