Finding the Fourth Proportional to 35,617.24, 53,430.90 and 13,438.72

Step by Step Solution

1. Step 1: Write the proportion equation
   35,617.24 : 53,430.90 = 13,438.72 : x
2. Step 2: Convert to fraction form
   35,617.24/53,430.90 = 13,438.72/x
3. Step 3: Cross multiply
   35,617.24x = 53,430.90 × 13,438.72
4. Step 4: Simplify right side
   35,617.24x = 718,042,904.45
5. Step 5: Solve for x
   x = 718,042,904.45/35,617.24
6. Step 6: Final answer
   x = 20,159.98