Finding the Fourth Proportional to 35,664.21, 53,485.33 and 13,488.03

Step by Step Solution

1. Step 1: Write the proportion equation
   35,664.21 : 53,485.33 = 13,488.03 : x
2. Step 2: Convert to fraction form
   35,664.21/53,485.33 = 13,488.03/x
3. Step 3: Cross multiply
   35,664.21x = 53,485.33 × 13,488.03
4. Step 4: Simplify right side
   35,664.21x = 721,411,735.60
5. Step 5: Solve for x
   x = 721,411,735.60/35,664.21
6. Step 6: Final answer
   x = 20,227.89