Finding the Fourth Proportional to 42,994.82, 64,499.81 and 13,405.29

Step by Step Solution

1. Step 1: Write the proportion equation
   42,994.82 : 64,499.81 = 13,405.29 : x
2. Step 2: Convert to fraction form
   42,994.82/64,499.81 = 13,405.29/x
3. Step 3: Cross multiply
   42,994.82x = 64,499.81 × 13,405.29
4. Step 4: Simplify right side
   42,994.82x = 864,638,590.97
5. Step 5: Solve for x
   x = 864,638,590.97/42,994.82
6. Step 6: Final answer
   x = 20,110.30