Finding the Fourth Proportional to 42,964.30, 64,449.52 and 17,979.19

Step by Step Solution

1. Step 1: Write the proportion equation
   42,964.30 : 64,449.52 = 17,979.19 : x
2. Step 2: Convert to fraction form
   42,964.30/64,449.52 = 17,979.19/x
3. Step 3: Cross multiply
   42,964.30x = 64,449.52 × 17,979.19
4. Step 4: Simplify right side
   42,964.30x = 1,158,750,241.81
5. Step 5: Solve for x
   x = 1,158,750,241.81/42,964.30
6. Step 6: Final answer
   x = 26,970.07