Finding the Fourth Proportional to 42,967.04, 64,456.56 and 13,387.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,967.04 : 64,456.56 = 13,387.04 : x
2. Step 2: Convert to fraction form
   42,967.04/64,456.56 = 13,387.04/x
3. Step 3: Cross multiply
   42,967.04x = 64,456.56 × 13,387.04
4. Step 4: Simplify right side
   42,967.04x = 862,882,546.98
5. Step 5: Solve for x
   x = 862,882,546.98/42,967.04
6. Step 6: Final answer
   x = 20,082.43