Finding the Fourth Proportional to 42,995.82, 64,501.31 and 13,406.29

Step by Step Solution

1. Step 1: Write the proportion equation
   42,995.82 : 64,501.31 = 13,406.29 : x
2. Step 2: Convert to fraction form
   42,995.82/64,501.31 = 13,406.29/x
3. Step 3: Cross multiply
   42,995.82x = 64,501.31 × 13,406.29
4. Step 4: Simplify right side
   42,995.82x = 864,723,267.24
5. Step 5: Solve for x
   x = 864,723,267.24/42,995.82
6. Step 6: Final answer
   x = 20,111.80