Finding the Fourth Proportional to 42,980.21, 64,473.33 and 17,995.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,980.21 : 64,473.33 = 17,995.04 : x
2. Step 2: Convert to fraction form
   42,980.21/64,473.33 = 17,995.04/x
3. Step 3: Cross multiply
   42,980.21x = 64,473.33 × 17,995.04
4. Step 4: Simplify right side
   42,980.21x = 1,160,200,152.28
5. Step 5: Solve for x
   x = 1,160,200,152.28/42,980.21
6. Step 6: Final answer
   x = 26,993.82