Finding the Fourth Proportional to 42,950.76, 64,449.18 and 18,321

Step by Step Solution

1. Step 1: Write the proportion equation
   42,950.76 : 64,449.18 = 18,321 : x
2. Step 2: Convert to fraction form
   42,950.76/64,449.18 = 18,321/x
3. Step 3: Cross multiply
   42,950.76x = 64,449.18 × 18,321
4. Step 4: Simplify right side
   42,950.76x = 1,180,773,426.78
5. Step 5: Solve for x
   x = 1,180,773,426.78/42,950.76
6. Step 6: Final answer
   x = 27,491.33