Finding the Fourth Proportional to 43,317.81, 64,978.56 and 13,734.99

Step by Step Solution

1. Step 1: Write the proportion equation
   43,317.81 : 64,978.56 = 13,734.99 : x
2. Step 2: Convert to fraction form
   43,317.81/64,978.56 = 13,734.99/x
3. Step 3: Cross multiply
   43,317.81x = 64,978.56 × 13,734.99
4. Step 4: Simplify right side
   43,317.81x = 892,479,871.81
5. Step 5: Solve for x
   x = 892,479,871.81/43,317.81
6. Step 6: Final answer
   x = 20,603.07