Finding the Fourth Proportional to 35,616.10, 53,436.54 and 13,435.87

Step by Step Solution

1. Step 1: Write the proportion equation
   35,616.10 : 53,436.54 = 13,435.87 : x
2. Step 2: Convert to fraction form
   35,616.10/53,436.54 = 13,435.87/x
3. Step 3: Cross multiply
   35,616.10x = 53,436.54 × 13,435.87
4. Step 4: Simplify right side
   35,616.10x = 717,966,404.69
5. Step 5: Solve for x
   x = 717,966,404.69/35,616.10
6. Step 6: Final answer
   x = 20,158.48