Finding the Fourth Proportional to 42,964.83, 64,419.30 and 18,020.88

Step by Step Solution

1. Step 1: Write the proportion equation
   42,964.83 : 64,419.30 = 18,020.88 : x
2. Step 2: Convert to fraction form
   42,964.83/64,419.30 = 18,020.88/x
3. Step 3: Cross multiply
   42,964.83x = 64,419.30 × 18,020.88
4. Step 4: Simplify right side
   42,964.83x = 1,160,892,474.98
5. Step 5: Solve for x
   x = 1,160,892,474.98/42,964.83
6. Step 6: Final answer
   x = 27,019.60